पाठ्यपुस्तके is an Android app developed by Teacher4U that provides all the textbooks for classes I to IV in one place. It is a useful app for students who have access to tablets in school and want to study based on their textbooks. The app also provides study material for all subjects of all classes from 1 to 5, which helps students plan their lessons accordingly. The app includes a compiled test list of various topics and a sample questionnaire for students to prepare for their exams. Currently, the app provides monthly components and annual planning for students, but in the future, it will provide more features. Overall, the app is a great resource for students who want to stay organized and succeed in their studies.