This is a free interactive digital textbook following the Grade 10 Kenyan competency based maths curriculum and has been co-developed by INNODEMS, IDEMS and the Kenyan Maths Society. It comes with teaching resources such as lesson plans and step-by-step guides to support teachers teaching this curriculum for the first time. You can find these in the respective sections of the book.

Interactive elements of the online book include e.g. automatically evaluated checkpoint questions (see further below) and animations (see e.g Figure 2.1.14) that can be projected in class or used by learners at home to explore on their own.

This book is also downloadable as PDF version.

We have created a version of this textbook with detailed lesson plans, which you can access via this link. This version contains additional instructions for teachers, such as discussion questions for activities and suggested time spent on each aspect of a lesson. You can click the Print button in the top right of the page to print out PDF lesson plans.

We also offer a free online course on teaching using competency-based education methodologies and contributing to these learning resources: CBE Math Delivery I Course

Access the course directly using the link above, or follow this guide to install the Moodle App to more easily follow the course on your phone.

We also offer free online trainings and opportunities to exchange you experience with other teachers. The strand-specific courses are linked in the sections of this book. You can find more information in the resources section of the project website.

We continuously work on improving the content of these materials and highly appreciate feedback and contributions, and will give credit accordingly. To leave feedback, click the Review button in the top right. Most elements of the book—activities, exercises and even paragraphs—have a small feedback symbol that appears when this button is clicked: Click on the icon to give feedback on the element. The CBE Math Delivery I Course course from above covers opportunities for contributing and feedback in more detail.

Click here for an (online) learner version of the book. Share this with learners (or their parents) who have access to digital devices. It features interactive Checkpoint questions that learners can use to practice at their own pace and get instant feedback on their solutions. These questions are randomized, so that learners can attempt a question multiple times and get a different random variant each time.

Below you can find an example of a checkpoint question. Click Show new example question to load the question, and to get new random versions. Enter your answer in the input boxes, and click Submit to get feedback on your answer.

Depending on your classroom setup, you also can make use of such checkpoints in your teaching in different ways. If your learners have access to digital devices during class, they can use the online version of the book to practice, but you can also use these to generate different versions of a question for group work or quizzes without devices, or to project a question on the board and automatically verify learners’ answers and give feedback.

The content of this book is aligned with the Kenyan Grade 10 Competency Based Curriculum for Mathematics. In Appendix A and Appendix B you can find a detailed mapping of the content of this book to the curriculum, including which learning outcomes are covered in which sections of the book.

Sections marked with an asterisk (*) in the title indicate sections that cover content that is not explicitly mentioned in the syllabus, but that we consider important for learners to master. (For example, (*) Surface Area of Cubes and Cuboids.)

This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. To view a copy of this license, visit CreativeCommons.org