A Computer science / AI course for Class 3 with 13 chapters. Each chapter contains detailed lessons, practice with answers, and assessment activities.
The Extender is a second book that sits beside your Class 3 Computational Thinking book. It does not teach new topics. Instead, it gives every chapter extra room to grow: more worked examples, puzzles that go one small step further, and more practice with answers.
Each chapter of the Extender follows the same plan. First comes a short note on what the Extender adds. Then come eight bonus sections, numbered E1.1, E1.2 and so on, each one matching the section with the same number in the main book. Every bonus section ends with a Your Turn question. After the bonus sections you will find an Extender Challenge with two harder puzzles, Extender Practice with multiple choice, short answer and think-and-solve questions, and finally the Extender Answers.
Use the Extender after you finish a chapter in the main book, or dip into one bonus section at a time as extra practice. Try every question on your own before you look at the answer. Getting stuck for a little while is part of learning to think like a computer scientist.