# Let's Study Book

> Free study app: solve your textbook's questions with instant feedback, keep a photo question notebook, follow homework and track progress in 6 languages.

Let's Study Book is a free (ad-supported) Android study app by QuanSystem (https://quansystem.com). Google Play: https://play.google.com/store/apps/details?id=com.nevbenev.letsstudybook (package com.nevbenev.letsstudybook). App and website languages: Turkish, English, German, Spanish, Italian, Swahili. The library currently has 56 books, 383 units, 1785 topic lesson sections and 7815 practice questions. Contact: info@quansystem.com.

## Key facts

- **Step-by-step book path**: Units unlock in order, with topic lessons and tests for every section.
- **Instant answers**: See right away whether you were right — and why, with explanations.
- **Question Notebook**: Photograph, crop and file the questions you couldn’t solve, from any book.
- **Progress reports**: Daily streak, weekly activity, accuracy and progress book by book.
- **Study with friends**: Send a tricky question to a friend or teacher and solve it together in a chat.
- **Classes & homework**: Teachers give homework with source, page range and due date — and grade it.
- **Parent tracking**: Parents link to their child and see homework and feedback day by day.
- **Worldwide**: 6 app languages and the school systems of 245 countries.
- **Price**: free to download and use; supported by ads.
- **Platform**: Android (Google Play). No iOS version.

## Main pages (English)

- [Home](https://letsstudybook.quansystem.com/en/): Let's Study Book — Solve your book, save tricky questions
- [Features](https://letsstudybook.quansystem.com/en/features/): All features of Let’s Study Book
- [Question Notebook](https://letsstudybook.quansystem.com/en/question-notebook/): Question Notebook: never lose a question you couldn’t solve
- [Books](https://letsstudybook.quansystem.com/en/books/): Book library
- [Teachers](https://letsstudybook.quansystem.com/en/teachers/): For teachers: classes, homework and feedback in one place
- [Parents](https://letsstudybook.quansystem.com/en/parents/): For parents: follow homework without the nagging
- [For authors](https://letsstudybook.quansystem.com/en/authors/): Are you an author or publisher? Publish your book on Let’s Study Book
- [Study guides](https://letsstudybook.quansystem.com/en/guides/): Study guides
- [FAQ](https://letsstudybook.quansystem.com/en/faq/): Frequently asked questions
- [Contact](https://letsstudybook.quansystem.com/en/contact/): Contact us
- [Privacy policy](https://letsstudybook.quansystem.com/en/privacy/): Privacy policy
- [Terms of use](https://letsstudybook.quansystem.com/en/terms/): Terms of use
- [Delete account](https://letsstudybook.quansystem.com/en/delete-account/): Delete your Let’s Study Book account

## Other languages

- [Türkçe](https://letsstudybook.quansystem.com/tr/)
- [Deutsch](https://letsstudybook.quansystem.com/de/)
- [Español](https://letsstudybook.quansystem.com/es/)
- [Italiano](https://letsstudybook.quansystem.com/it/)
- [Kiswahili](https://letsstudybook.quansystem.com/sw/)

## Study guides

- [Lernplan erstellen und dranbleiben: Täglich lernen mit kleinen Zielen](https://letsstudybook.quansystem.com/de/ratgeber/lernplan-erstellen-und-dranbleiben/) (de): So erstellst du einen Lernplan, den du wirklich durchhältst: kleine Tagesziele, Pomodoro-Technik, Wochenrückblick und eine Lernserie, die dich jeden Tag motiviert.
- [How to Make a Daily Study Plan and Keep Your Study Streak](https://letsstudybook.quansystem.com/en/guides/how-to-make-a-daily-study-plan/) (en): Build a daily study plan you can actually follow: small daily goals, Pomodoro sessions, a weekly review and simple tricks to keep your study streak going.
- [Cómo hacer un plan de estudio diario y mantener tu racha](https://letsstudybook.quansystem.com/es/guias/como-hacer-un-plan-de-estudio-diario/) (es): Crea un plan de estudio diario realista: objetivos pequeños, la técnica Pomodoro, un repaso semanal y trucos para mantener tu racha de estudio sin agobiarte.
- [Piano di studio giornaliero: come organizzarti e non perdere la serie](https://letsstudybook.quansystem.com/it/guide/piano-di-studio-giornaliero/) (it): Come creare un piano di studio giornaliero realistico: piccoli obiettivi, tecnica del pomodoro, ripasso settimanale e una serie di giorni di studio da mantenere.
- [Ratiba ya kujisomea kila siku na jinsi ya kudumisha mfululizo](https://letsstudybook.quansystem.com/sw/miongozo/ratiba-ya-kujisomea-kila-siku/) (sw): Jinsi ya kupanga ratiba ya kujisomea kila siku: malengo madogo, mbinu ya Pomodoro, marudio ya wiki na kudumisha mfululizo hata ukiwa na muda au data kidogo.
- [Günlük Ders Çalışma Programı Nasıl Hazırlanır? Seriyi Bozmadan Çalışmak](https://letsstudybook.quansystem.com/tr/rehber/gunluk-ders-calisma-programi-hazirlama/) (tr): Gerçekçi bir günlük ders çalışma programı hazırla: küçük günlük hedefler, Pomodoro tekniği, haftalık değerlendirme ve her gün çalışma serisini korumanın yolları.
- [Prüfungsvorbereitung: Mit Probetests in Klassenarbeit und Abitur](https://letsstudybook.quansystem.com/de/ratgeber/pruefungsvorbereitung-klassenarbeiten-abitur/) (de): So bereitest du dich mit Probetests und Abruf-Übungen auf Klassenarbeiten und das Abitur vor: Zeitplan, alte Prüfungen, Fehleranalyse und die letzten Tage davor.
- [How to Prepare for Exams With Practice Tests and Retrieval Practice](https://letsstudybook.quansystem.com/en/guides/how-to-prepare-for-exams-with-practice-tests/) (en): Prepare for school tests, GCSE/IGCSE-style papers and national exams like Tanzania's FTNA and CSEE with practice tests, retrieval practice and a clear revision plan.
- [Cómo preparar exámenes con simulacros y práctica de recuperación](https://letsstudybook.quansystem.com/es/guias/como-preparar-examenes-con-simulacros/) (es): Prepara tus exámenes y la EBAU/PAU con simulacros y práctica de recuperación: un plan por semanas, cómo corregir tus pruebas y qué hacer la víspera del examen.
- [Come prepararsi a verifiche e maturità con le esercitazioni](https://letsstudybook.quansystem.com/it/guide/come-prepararsi-a-verifiche-e-maturita/) (it): Come prepararsi a verifiche, interrogazioni e maturità con la pratica del recupero: simulazioni, domande a memoria, analisi degli errori e ripasso a intervalli.
- [Jinsi ya kujiandaa na mitihani ya FTNA na CSEE kwa maswali ya mazoezi](https://letsstudybook.quansystem.com/sw/miongozo/jinsi-ya-kujiandaa-na-mitihani-ftna-csee/) (sw): Jiandae na FTNA na CSEE kwa mazoezi ya kukumbuka: mitihani iliyopita, majaribio (mock), ratiba ya marudio na uchambuzi wa makosa kwa Kidato cha 2 na cha 4.
- [Sınava Nasıl Hazırlanılır? Deneme Çözerek LGS, YKS ve KPSS Hazırlığı](https://letsstudybook.quansystem.com/tr/rehber/sinava-nasil-hazirlanilir-deneme-cozme/) (tr): LGS, YKS (TYT/AYT), KPSS ve okul yazılılarına deneme çözerek hazırlan: geri çağırma pratiği, karışık soru çözümü, deneme sonrası analiz ve son hafta planı.
- [Aus Fehlern lernen: Fehleranalyse Schritt für Schritt für Schüler](https://letsstudybook.quansystem.com/de/ratgeber/aus-fehlern-lernen-fehleranalyse/) (de): Wissenslücke, Flüchtigkeitsfehler, falsch gelesen oder Zeitnot? So analysierst du falsche Antworten Schritt für Schritt und machst Fehler nicht zweimal.
- [How to Learn From Mistakes: A Step-by-Step Wrong-Answer Analysis](https://letsstudybook.quansystem.com/en/guides/how-to-learn-from-mistakes/) (en): Turn wrong answers into marks: a step-by-step method to analyse mistakes, spot knowledge gaps, careless slips, misreads and time problems, and fix each one.
- [Cómo aprender de los errores: analiza tus fallos paso a paso](https://letsstudybook.quansystem.com/es/guias/como-aprender-de-los-errores/) (es): Aprende a analizar tus respuestas incorrectas paso a paso: los cuatro tipos de error (conocimiento, despiste, mala lectura y tiempo) y qué hacer con cada uno.
- [Come imparare dagli errori: analizzare le risposte sbagliate passo dopo passo](https://letsstudybook.quansystem.com/it/guide/come-imparare-dagli-errori/) (it): Errori di conoscenza, di distrazione, di lettura o di tempo: come riconoscerli e correggerli dopo una verifica, con un metodo in cinque passi pensato per studenti.
- [Kujifunza kutokana na makosa: uchambuzi wa majibu yasiyo sahihi](https://letsstudybook.quansystem.com/sw/miongozo/kujifunza-kutokana-na-makosa/) (sw): Hatua kwa hatua jinsi ya kuchambua jibu lisilo sahihi: aina nne za makosa (ujuzi, uzembe, kusoma vibaya, muda) na nini cha kufanya kwa kila moja.
- [Yanlış Analizi Nasıl Yapılır? Hatalarından Öğrenmenin Adım Adım Yolu](https://letsstudybook.quansystem.com/tr/rehber/yanlis-analizi-nasil-yapilir/) (tr): Deneme ve testlerdeki yanlışlarını nasıl analiz edersin? Bilgi eksikliği, dikkatsizlik, yanlış okuma ve süre hatalarını ayırt edip her birini düzeltme yöntemi.
- [Kind beim Lernen unterstützen – ohne Druck: Ratgeber für Eltern](https://letsstudybook.quansystem.com/de/ratgeber/kind-beim-lernen-unterstuetzen-ohne-druck/) (de): Wie Eltern ihr Kind beim Lernen zu Hause ohne Druck unterstützen: feste Routinen, die richtigen Fragen, Anstrengung loben und gesunde Bildschirmzeit.
- [How to Help Your Child Study at Home Without Pressure](https://letsstudybook.quansystem.com/en/guides/how-to-help-your-child-study-at-home/) (en): A practical guide for parents: build a calm study routine, ask questions that help, celebrate effort, balance screen time and support your child without nagging.
- [Cómo ayudar a tu hijo a estudiar en casa sin presión](https://letsstudybook.quansystem.com/es/guias/como-ayudar-a-tu-hijo-a-estudiar/) (es): Guía para familias: cómo ayudar a tu hijo a estudiar en casa sin presión, con rutinas, buenas preguntas, celebración del esfuerzo y equilibrio con las pantallas.
- [Per genitori: come aiutare i figli a studiare a casa senza pressione](https://letsstudybook.quansystem.com/it/guide/aiutare-i-figli-a-studiare-a-casa/) (it): Come sostenere lo studio dei figli a casa senza ansia né litigi: una routine serena, le domande giuste, festeggiare l'impegno ed equilibrio con gli schermi.
- [Kwa wazazi: jinsi ya kumsaidia mtoto kujisomea nyumbani bila shinikizo](https://letsstudybook.quansystem.com/sw/miongozo/mzazi-kumsaidia-mtoto-kujisomea-nyumbani/) (sw): Ushauri kwa wazazi na walezi: kujenga utaratibu wa kujisomea nyumbani, maswali ya kumuuliza mtoto, kusherehekea juhudi na kusawazisha muda wa simu.
- [Çocuğun Ders Çalışmasına Nasıl Destek Olunur? Baskı Yapmadan Velilik](https://letsstudybook.quansystem.com/tr/rehber/cocugun-ders-calismasina-nasil-destek-olunur/) (tr): Veliler için: çocuğunuzun evde ders çalışmasını baskı kurmadan destekleyin. Düzenli rutin, doğru sorular, emeği kutlamak ve ekran dengesi için pratik öneriler.
- [Fehlerheft richtig führen: So lernst du gezielt aus deinen Fehlern](https://letsstudybook.quansystem.com/de/ratgeber/fehlerheft-richtig-fuehren/) (de): So führst du ein Fehlerheft, das wirklich hilft: was du zu jeder Aufgabe notierst, Papier oder digital und eine einfache Routine vor der Klassenarbeit.
- [How to Keep a Question Notebook (Error Log) That Really Works](https://letsstudybook.quansystem.com/en/guides/how-to-keep-a-question-notebook/) (en): Learn how to keep a question notebook or error log: what to write for each question, paper vs digital, and a simple review routine that turns mistakes into marks.
- [Cómo hacer un cuaderno de errores que de verdad funcione](https://letsstudybook.quansystem.com/es/guias/como-hacer-un-cuaderno-de-errores/) (es): Aprende a llevar un cuaderno de errores: qué anotar en cada pregunta, papel o digital, y una rutina de repaso sencilla que convierte tus fallos en puntos.
- [Come tenere un quaderno degli errori che funziona davvero](https://letsstudybook.quansystem.com/it/guide/come-tenere-un-quaderno-degli-errori/) (it): Quaderno degli errori: cosa scriverci, carta o digitale, come ripassarlo prima di verifiche e interrogazioni. Una guida pratica, passo dopo passo, per studenti.
- [Jinsi ya kuweka daftari la maswali linalokusaidia kweli](https://letsstudybook.quansystem.com/sw/miongozo/jinsi-ya-kuweka-daftari-la-maswali/) (sw): Daftari la maswali ni nini na jinsi ya kuliweka: karatasi au simu, nini cha kuandika kwa kila swali na jinsi ya kulipitia kabla ya FTNA na CSEE.
- [Soru Defteri Nasıl Tutulur? Gerçekten İşe Yarayan Yöntem](https://letsstudybook.quansystem.com/tr/rehber/soru-defteri-nasil-tutulur/) (tr): Soru defteri nasıl tutulur? Hangi soruları yazmalı, nasıl not almalı, ne zaman tekrar etmeli? Kâğıt ve dijital defter karşılaştırması ve adım adım yöntem.
- [Spaced Repetition und Vergessenskurve: Weniger lernen, mehr behalten](https://letsstudybook.quansystem.com/de/ratgeber/spaced-repetition-und-vergessenskurve/) (de): Was die Vergessenskurve über dein Gedächtnis verrät und wie du mit Spaced Repetition und einem 1-3-7-14-Tage-Plan Vokabeln und Formeln dauerhaft behältst.
- [Spaced Repetition Study Schedule: Beat the Forgetting Curve](https://letsstudybook.quansystem.com/en/guides/spaced-repetition-study-schedule/) (en): How spaced repetition works, why the forgetting curve matters, and how to use a simple 1-3-7-14 day review schedule to study less and remember more.
- [Repaso espaciado y curva del olvido: estudia menos y recuerda más](https://letsstudybook.quansystem.com/es/guias/repaso-espaciado-curva-del-olvido/) (es): Qué es el repaso espaciado, cómo funciona la curva del olvido de Ebbinghaus y cómo organizar tus repasos a 1, 3, 7 y 14 días para recordar lo estudiado en el examen.
- [Ripetizione dilazionata e curva dell'oblio: studia meno, ricorda di più](https://letsstudybook.quansystem.com/it/guide/ripetizione-dilazionata-curva-dell-oblio/) (it): Cos'è la curva dell'oblio di Ebbinghaus e come usare la ripetizione dilazionata con un calendario 1-3-7-14 giorni per ricordare quello che studi fino alla verifica.
- [Mbinu ya kurudia kwa vipindi: soma kidogo, kumbuka zaidi](https://letsstudybook.quansystem.com/sw/miongozo/mbinu-ya-kurudia-kwa-vipindi/) (sw): Jinsi kurudia kwa vipindi kunavyoshinda kusahau: mkondo wa kusahau wa Ebbinghaus, ratiba ya siku 1-3-7-14 na mfano wa kuitumia kwa masomo ya Kidato 1–4.
- [Aralıklı Tekrar Yöntemi ve Unutma Eğrisi: Az Çalış, Çok Hatırla](https://letsstudybook.quansystem.com/tr/rehber/aralikli-tekrar-yontemi-unutma-egrisi/) (tr): Aralıklı tekrar nedir, unutma eğrisi neyi anlatır? 1-3-7-14 gün tekrar programıyla öğrendiklerini kalıcı hâle getirmenin pratik yolu, örnek planla.
- [Mit Freunden lernen: So funktioniert eure Lerngruppe wirklich](https://letsstudybook.quansystem.com/de/ratgeber/mit-freunden-lernen-lerngruppe/) (de): Gemeinsam lernen, ohne abzuschweifen: warum Erklären hilft (Protégé-Effekt), wie ihr eure Lerngruppe organisiert und welche Methoden wirklich funktionieren.
- [How to Study With Friends: Peer Learning That Stays Focused](https://letsstudybook.quansystem.com/en/guides/how-to-study-with-friends/) (en): Make group study work: use peer learning and the protégé effect, explain topics to each other, set clear goals and roles, and keep sessions with friends focused.
- [Cómo estudiar en grupo con amigos sin perder el tiempo](https://letsstudybook.quansystem.com/es/guias/como-estudiar-en-grupo-con-amigos/) (es): Aprende a estudiar en grupo con amigos: por qué explicar a otros te ayuda a aprender (efecto protegido), cómo organizar la sesión y evitar que acabe en charla.
- [Studiare con gli amici: come far funzionare lo studio di gruppo](https://letsstudybook.quansystem.com/it/guide/studiare-con-gli-amici/) (it): Studiare con gli amici funziona se il gruppo è organizzato: spiegare agli altri (effetto protégé), interrogarsi a vicenda e restare concentrati.
- [Kujisomea na marafiki: jinsi ya kufanikisha kikundi cha kujisomea](https://letsstudybook.quansystem.com/sw/miongozo/kujisomea-na-marafiki-kwa-vikundi/) (sw): Jinsi ya kujisomea na marafiki kwa ufanisi: kufundishana, athari ya mwalimu-mwanafunzi, majukumu ndani ya kikundi na kuweka kikundi kikizingatia masomo.
- [Arkadaşlarla Ders Çalışma: Birbirine Anlatarak Öğrenmenin Yolları](https://letsstudybook.quansystem.com/tr/rehber/arkadaslarla-ders-calisma-yontemleri/) (tr): Arkadaşlarla ders çalışma verimli mi? Birbirine anlatarak öğrenme (protégé etkisi), grup çalışmasını odakta tutma ve çevrim içi soru paylaşımı için öneriler.
- [Hausaufgaben digital verteilen und kontrollieren: Tipps für Lehrkräfte](https://letsstudybook.quansystem.com/de/ratgeber/hausaufgaben-digital-verteilen-und-kontrollieren/) (de): Für Lehrkräfte: Hausaufgaben digital stellen und verfolgen – mit klaren Aufträgen, Seitenangaben, Abgabeterminen, schnellem Feedback und offenen Antworten.
- [How to Assign and Track Homework Digitally: A Guide for Teachers](https://letsstudybook.quansystem.com/en/guides/how-to-assign-homework-digitally/) (en): A practical guide for teachers on assigning and tracking homework digitally: clear instructions, page ranges, due dates, quick feedback and reviewing open answers.
- [Para docentes: cómo poner y revisar deberes de forma digital](https://letsstudybook.quansystem.com/es/guias/gestionar-deberes-de-forma-digital/) (es): Guía para docentes: cómo poner deberes digitales con instrucciones claras, páginas y fecha de entrega, revisarlos rápido y dar un feedback útil.
- [Per insegnanti: come assegnare e seguire i compiti online](https://letsstudybook.quansystem.com/it/guide/assegnare-e-seguire-i-compiti-online/) (it): Guida per docenti: assegnare compiti in digitale con consegne chiare, pagine e scadenze, dare feedback rapido e valutare le risposte aperte senza perdere tempo.
- [Kwa walimu: kutoa na kufuatilia kazi za nyumbani kidijitali](https://letsstudybook.quansystem.com/sw/miongozo/walimu-kutoa-na-kufuatilia-kazi-za-nyumbani/) (sw): Mwongozo kwa walimu: jinsi ya kutoa kazi za nyumbani zilizo wazi, kuweka kurasa na tarehe ya mwisho, kutoa tathmini ya haraka na kupitia majibu ya wazi.
- [Öğretmenler İçin Dijital Ödev Takibi: Net Ödev, Hızlı Geri Bildirim](https://letsstudybook.quansystem.com/tr/rehber/ogretmenler-icin-dijital-odev-takibi/) (tr): Öğretmenler için dijital ödev verme ve takip rehberi: açık talimat, kaynak ve sayfa aralığı, son gün, hızlı geri bildirim ve açık uçlu cevapları değerlendirme.
- [Richtig lernen mit dem Schulbuch: Aktives Lesen in fünf Schritten](https://letsstudybook.quansystem.com/de/ratgeber/richtig-lernen-mit-dem-schulbuch/) (de): Schulbuch gelesen und nichts behalten? Mit aktivem Lesen in fünf Schritten – überfliegen, fragen, lesen, abrufen, wiederholen – bleibt der Stoff hängen.
- [How to Study From a Textbook: Active Reading in Five Steps](https://letsstudybook.quansystem.com/en/guides/how-to-study-from-a-textbook/) (en): Stop re-reading and start remembering: learn how to study from a textbook with active reading — preview, question, read, recall and review — with real examples.
- [Cómo estudiar un libro de texto con lectura activa](https://letsstudybook.quansystem.com/es/guias/como-estudiar-un-libro-de-texto/) (es): Aprende a estudiar un libro de texto con lectura activa en cinco pasos: vistazo previo, preguntas, lectura, recuerdo y repaso. Con ejemplos para ESO y Bachillerato.
- [Come studiare dal libro di testo: il metodo della lettura attiva](https://letsstudybook.quansystem.com/it/guide/come-studiare-dal-libro-di-testo/) (it): Come studiare dal libro di testo in cinque fasi: anteprima, domande, lettura, ripetizione a memoria e ripasso. Il metodo della lettura attiva per medie e superiori.
- [Jinsi ya kusoma kitabu cha kiada kwa ufanisi: usomaji hai](https://letsstudybook.quansystem.com/sw/miongozo/jinsi-ya-kusoma-kitabu-cha-kiada/) (sw): Jinsi ya kusoma kitabu cha kiada kwa hatua tano za usomaji hai: kuchungulia, kuuliza, kusoma, kukumbuka na kurudia, kwa mifano ya masomo ya Kidato 1–4.
- [Ders Kitabından Nasıl Çalışılır? Aktif Okuma ile Verimli Çalışma Yöntemi](https://letsstudybook.quansystem.com/tr/rehber/ders-kitabindan-verimli-calisma-yontemi/) (tr): Ders kitabından verimli çalışmanın yolu aktif okuma: göz gezdir, soru sor, oku, hatırla, tekrar et. MEB ders kitapları ve okul dersleri için adım adım yöntem.

## Books

- [Basic Mathematics Form 1](https://letsstudybook.quansystem.com/en/books/basic-mathematics-form-1/): Basic Mathematics, TZ Form 1; 9 units, 145 questions, 54 lesson sections.
- [Basic Mathematics Form 2](https://letsstudybook.quansystem.com/en/books/basic-mathematics-form-2/): Basic Mathematics, TZ Form 2; 10 units, 153 questions, 58 lesson sections.
- [Basic Mathematics Form 3](https://letsstudybook.quansystem.com/en/books/basic-mathematics-form-3/): Basic Mathematics, TZ Form 3; 8 units, 120 questions, 45 lesson sections.
- [Basic Mathematics Form 4](https://letsstudybook.quansystem.com/en/books/basic-mathematics-form-4/): Basic Mathematics, TZ Form 4; 8 units, 126 questions, 45 lesson sections.
- [Biology Form 1](https://letsstudybook.quansystem.com/en/books/biology-form-1/): Biology, TZ Form 1; 5 units, 77 questions, 28 lesson sections.
- [Biology Form 2](https://letsstudybook.quansystem.com/en/books/biology-form-2/): Biology, TZ Form 2; 7 units, 114 questions, 43 lesson sections.
- [Biology Form 3](https://letsstudybook.quansystem.com/en/books/biology-form-3/): Biology, TZ Form 3; 8 units, 131 questions, 46 lesson sections.
- [Biology Form 4](https://letsstudybook.quansystem.com/en/books/biology-form-4/): Biology, TZ Form 4; 6 units, 100 questions, 37 lesson sections.
- [Book Keeping Form 1](https://letsstudybook.quansystem.com/en/books/book-keeping-form-1/): Book Keeping, TZ Form 1; 6 units, 93 questions, 31 lesson sections.
- [Book Keeping Form 2](https://letsstudybook.quansystem.com/en/books/book-keeping-form-2/): Book Keeping, TZ Form 2; 7 units, 109 questions, 36 lesson sections.
- [Book Keeping Form 3](https://letsstudybook.quansystem.com/en/books/book-keeping-form-3/): Book Keeping, TZ Form 3; 11 units, 175 questions, 57 lesson sections.
- [Book Keeping Form 4](https://letsstudybook.quansystem.com/en/books/book-keeping-form-4/): Book Keeping, TZ Form 4; 6 units, 95 questions, 31 lesson sections.
- [Chemistry Form 1](https://letsstudybook.quansystem.com/en/books/chemistry-form-1/): Chemistry, TZ Form 1; 6 units, 90 questions, 34 lesson sections.
- [Chemistry Form 2](https://letsstudybook.quansystem.com/en/books/chemistry-form-2/): Chemistry, TZ Form 2; 7 units, 113 questions, 41 lesson sections.
- [Chemistry Form 3](https://letsstudybook.quansystem.com/en/books/chemistry-form-3/): Chemistry, TZ Form 3; 9 units, 146 questions, 53 lesson sections.
- [Chemistry Form 4](https://letsstudybook.quansystem.com/en/books/chemistry-form-4/): Chemistry, TZ Form 4; 7 units, 117 questions, 42 lesson sections.
- [Civics Form 1](https://letsstudybook.quansystem.com/en/books/civics-form-1/): Civics, TZ Form 1; 9 units, 143 questions, 44 lesson sections.
- [Civics Form 2](https://letsstudybook.quansystem.com/en/books/civics-form-2/): Civics, TZ Form 2; 4 units, 68 questions, 24 lesson sections.
- [Civics Form 3](https://letsstudybook.quansystem.com/en/books/civics-form-3/): Civics, TZ Form 3; 3 units, 50 questions, 18 lesson sections.
- [Civics Form 4](https://letsstudybook.quansystem.com/en/books/civics-form-4/): Civics, TZ Form 4; 2 units, 32 questions, 12 lesson sections.
- [Commerce Form 1](https://letsstudybook.quansystem.com/en/books/commerce-form-1/): Commerce, TZ Form 1; 2 units, 33 questions, 12 lesson sections.
- [Commerce Form 2](https://letsstudybook.quansystem.com/en/books/commerce-form-2/): Commerce, TZ Form 2; 5 units, 81 questions, 30 lesson sections.
- [Commerce Form 3](https://letsstudybook.quansystem.com/en/books/commerce-form-3/): Commerce, TZ Form 3; 6 units, 97 questions, 38 lesson sections.
- [Commerce Form 4](https://letsstudybook.quansystem.com/en/books/commerce-form-4/): Commerce, TZ Form 4; 5 units, 79 questions, 32 lesson sections.
- [Computer Studies Form 1](https://letsstudybook.quansystem.com/en/books/computer-studies-form-1/): Computer Studies, TZ Form 1; 5 units, 82 questions, 28 lesson sections.
- [Computer Studies Form 2](https://letsstudybook.quansystem.com/en/books/computer-studies-form-2/): Computer Studies, TZ Form 2; 4 units, 67 questions, 24 lesson sections.
- [Computer Studies Form 3](https://letsstudybook.quansystem.com/en/books/computer-studies-form-3/): Computer Studies, TZ Form 3; 3 units, 51 questions, 19 lesson sections.
- [Computer Studies Form 4](https://letsstudybook.quansystem.com/en/books/computer-studies-form-4/): Computer Studies, TZ Form 4; 4 units, 68 questions, 25 lesson sections.
- [English Language Form 1](https://letsstudybook.quansystem.com/en/books/english-language-form-1/): English Language, TZ Form 1; 16 units, 249 questions, 71 lesson sections.
- [English Language Form 2](https://letsstudybook.quansystem.com/en/books/english-language-form-2/): English Language, TZ Form 2; 11 units, 176 questions, 54 lesson sections.
- [English Language Form 3](https://letsstudybook.quansystem.com/en/books/english-language-form-3/): English Language, TZ Form 3; 6 units, 100 questions, 33 lesson sections.
- [English Language Form 4](https://letsstudybook.quansystem.com/en/books/english-language-form-4/): English Language, TZ Form 4; 5 units, 83 questions, 27 lesson sections.
- [Geography Form 1](https://letsstudybook.quansystem.com/en/books/geography-form-1/): Geography, TZ Form 1; 5 units, 82 questions, 29 lesson sections.
- [Geography Form 2](https://letsstudybook.quansystem.com/en/books/geography-form-2/): Geography, TZ Form 2; 9 units, 144 questions, 53 lesson sections.
- [Geography Form 3](https://letsstudybook.quansystem.com/en/books/geography-form-3/): Geography, TZ Form 3; 7 units, 115 questions, 43 lesson sections.
- [Geography Form 4](https://letsstudybook.quansystem.com/en/books/geography-form-4/): Geography, TZ Form 4; 5 units, 83 questions, 33 lesson sections.
- [History Form 1](https://letsstudybook.quansystem.com/en/books/history-form-1/): History, TZ Form 1; 4 units, 64 questions, 25 lesson sections.
- [History Form 2](https://letsstudybook.quansystem.com/en/books/history-form-2/): History, TZ Form 2; 4 units, 63 questions, 25 lesson sections.
- [History Form 3](https://letsstudybook.quansystem.com/en/books/history-form-3/): History, TZ Form 3; 4 units, 64 questions, 23 lesson sections.
- [History Form 4](https://letsstudybook.quansystem.com/en/books/history-form-4/): History, TZ Form 4; 5 units, 83 questions, 29 lesson sections.
- [Kiswahili Form 1](https://letsstudybook.quansystem.com/en/books/kiswahili-form-1/): Kiswahili, TZ Form 1; 7 units, 110 questions, 36 lesson sections.
- [Kiswahili Form 2](https://letsstudybook.quansystem.com/en/books/kiswahili-form-2/): Kiswahili, TZ Form 2; 8 units, 125 questions, 43 lesson sections.
- [Kiswahili Form 3](https://letsstudybook.quansystem.com/en/books/kiswahili-form-3/): Kiswahili, TZ Form 3; 8 units, 125 questions, 44 lesson sections.
- [Kiswahili Form 4](https://letsstudybook.quansystem.com/en/books/kiswahili-form-4/): Kiswahili, TZ Form 4; 4 units, 63 questions, 23 lesson sections.
- [Physics Form 1](https://letsstudybook.quansystem.com/en/books/physics-form-1/): Physics, TZ Form 1; 10 units, 153 questions, 58 lesson sections.
- [Physics Form 2](https://letsstudybook.quansystem.com/en/books/physics-form-2/): Physics, TZ Form 2; 9 units, 138 questions, 53 lesson sections.
- [Physics Form 3](https://letsstudybook.quansystem.com/en/books/physics-form-3/): Physics, TZ Form 3; 9 units, 133 questions, 51 lesson sections.
- [Physics Form 4](https://letsstudybook.quansystem.com/en/books/physics-form-4/): Physics, TZ Form 4; 8 units, 129 questions, 45 lesson sections.
- [6. SINIF FEN BİLİMLERİ](https://letsstudybook.quansystem.com/en/books/6-sinif-fen-bilimleri/): TR 6. Sınıf; 6 units, 88 questions.
- [7th Grade English](https://letsstudybook.quansystem.com/en/books/7th-grade-english/): TR 7. Sınıf; 10 units, 374 questions.
- [6th Grade English](https://letsstudybook.quansystem.com/en/books/6th-grade-english/): TR 6. Sınıf; 10 units, 370 questions.
- [8. Sınıf T.C. İnkîlap Tarihi ve Atatürkçülük](https://letsstudybook.quansystem.com/en/books/8-sinif-t-c-inkilap-tarihi-ve-ataturkculuk/): TR 8. Sınıf; 6 units, 124 questions.
- [5th Grade English](https://letsstudybook.quansystem.com/en/books/5th-grade-english/): TR 5. Sınıf; 10 units, 369 questions.
- [Primary School 4th Grade English](https://letsstudybook.quansystem.com/en/books/primary-school-4th-grade-english/): İlkokul, TR 4. Sınıf; 10 units, 357 questions.
- [8. Sınıf Din Kültürü ve Ahlak Bilgisi](https://letsstudybook.quansystem.com/en/books/8-sinif-din-kulturu-ve-ahlak-bilgisi/): TR 8. Sınıf; 5 units, 160 questions.
- [Primary School 3rd Grade English](https://letsstudybook.quansystem.com/en/books/primary-school-3rd-grade-english/): İlkokul, TR 3. Sınıf; 10 units, 936 questions.

## FAQ

### Is Let’s Study Book free?

Yes. The app is free to download and use. It is supported by ads.

### Which devices does it work on?

Let’s Study Book is available for Android phones and tablets on Google Play.

### Which languages does the app support?

Turkish, English, German, Spanish, Italian and Swahili. You can change the language at any time in Settings.

### Which books are in the library?

Primary and middle-school books (for example English for grades 3–7 and science) and the full Tanzania secondary syllabus for Form 1–4: Mathematics, Biology, Chemistry, Physics, Geography, History, Civics, Commerce, Book Keeping, Computer Studies, English and Kiswahili. New books are added regularly.

### What is the Question Notebook?

A digital notebook for the questions you couldn’t solve. You photograph a question, crop it, add your answer, the correct answer and a note, and mark it “Couldn’t solve”, “Will review” or “Solved”.

### Can I add questions from books that are not in the app?

Yes. The Question Notebook works with any book, test paper or worksheet. You can also scan a book’s barcode to record where a question comes from.

### How do I become a teacher in the app?

Choose “Teacher” as your account type and send your application. After our team approves it you can open classes, invite students and assign homework.

### How do parents connect to their child?

A parent links to the child’s account with a code or sends a request that the child accepts. The parent then sees homework, teacher feedback and late tasks day by day.

### Can my friends see my notebook?

No. Your notebook is private. You decide which single question you send to a friend or teacher.

### I forgot my password. What can I do?

Use “Forgot password” on the login screen to get a 6-digit code by email. If your account has no email, you can use the contact form in the app or on this site.

### How do I delete my account?

In the app go to Settings → Delete account. You can also request deletion on our account deletion page.

### I am an author. How can I publish my book?

Write to info@quansystem.com with your book’s details. We will add it to the library and help it reach students.