Teacher Resources (new)
A 2.4.1 Firewalls
Firewalls protect networks by inspecting traffic using whitelists, blacklists, and rules. They offer centralised security and traffic control but have limitations against internal threats and complex...
DP essentials
Crafting a Research Question and Title for Computer Science EE
Crafting a well-defined research question and title is the foundation of a successful Computer Science Extended Essay. This section explains how placing Computer Science within Group 4 alongside the natural...
Activities
B 2.4.2 Worksheet Answer Key
Implement Linear Search with a Twist: Trace Linear Search: target = "orange", caseSensitive = true: The algorithm checks "apple", "Banana", "orange" and returns true. target = "Orange", caseSensitive...
Teacher Resources (new)
B 4.1.5 Construct and apply sets as an ADT Java
This resource provides four complete one-hour lessons for teaching IB Computer Science topic B4.1.5, Sets as an ADT, using Java. Students will master HashSet characteristics, union, intersection, difference,...
Activities
B 4.1.6 Worksheet 4 Java Answers
1. Calculating Load Factor 2. Rehashing 3. Application: Character Frequency...
Activities
A 3.3.3 Indexing activity
Topic Alignment: A3.3.3 Explain how SQL can be used to update data in a database. Evaluate the performance implications of updating data in indexed columns, and how indexes might need to be rebuilt or...
Teacher Resources (new)
A 3.3.3 Updating Data in Databases with SQL
SQL can modify databases via INSERT, UPDATE, and DELETE. Indexing impacts update speed and large changes may require index rebuilds. Updated 22/02/2026 By the end of this lesson, students will be able...
Activities
B 2.3.4 Worksheet answers - Python
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eBook
Wireless Networking
This section of the ebook evaluates the construction and characteristics of wireless networking and looks in detail at network security Outline - Give a brief account or summary. Summary: While wireless...
eBook
Data Transmission
This section deals with understanding the transfer of data from one digital device to another. This transfer occurs via point-to-point data streams or channels. [Last update: 19 Feb 2026] Define - Give...