Activities
B 2.1.2 Worksheet
For this section, use only the basic operations taught in class (concatenation, extraction/slicing, and .replace()). These problems may require methods or logic (like loops or if statements) that we have...
Activities
B 2.1.2 Worksheet Answers
This key provides solutions in both Java and Python. 1. Concatenation: Java: Python: 2. Extraction (Slicing): Java: Python: 3. Replacing: Java: Python: 4. Practical Extraction: Java: Python: 5. Manual...
Teacher Resources (new)
B 2.1.2 Python
This page provides a complete 60-minute lesson for IB DP Computer Science topic B2.1.2 (String Manipulation) using Python. It focuses on teaching concatenation (+), extraction (slicing [:]), and replacement...
eBook
B 2.2.4 Queues Java
This section introduces the queue data structure, which operates on the FIFO principle (like a line at a store!). We'll explore key operations (enqueue, dequeue, front, isEmpty), their efficiency, and...
Teacher Resources (new)
Introduction to IB Computer Science
Two introductory lessons to introduce students to the IB Computer Science course and computational thinking. By the end of this lesson, students will be able to: Link to presentation Welcome & Icebreaker:...
Assessment
Internal Assessment - Teacher Guide
Teacher Guide for the Computer Science Internal Assessment, last examination sessions 2026. Before you start make sure you have thoroughly read through the internal assessment details on the IB Computer...
Activities
B 2.4.4 Worksheet Java
Instructions: Complete the following exercises to deepen your understanding of recursion in Java. 1. Analyse the following recursive Java methods: For each method, identify: 2. Compare the following recursive...
Activities
B 2.4.5 Worksheet 1 Java
Question 1 (a) The iterative method iter_d(int n) is shown, which prints numbers to the console: (i) State the output printed by the call iter_d(4);. [1] (ii) Construct the recursive method recur_d(int...
Activities
B 2.4.5 Worksheet 1 Python
Question 1 (a) The iterative method iter_d(n) is shown, which prints numbers to the console: (i) State the output printed by the call iter_d(4). [1] (ii) Construct the recursive method recur_d(n) that...
Activities
B 2.4.5 Worksheet 1 answers
Question 1 (a) (i) State the output printed by the call iter_d(4);. [1] (a) (ii) Construct the recursive method recur_d(int n)... [3] Question 2 (a) (i) State the value returned by the call iter_e("Go",...