Teacher Resources (new)
B1 Computational thinking
B1 Computational Thinking builds the problem-solving toolkit that underpins programming. It covers approaches to computational thinking, from specifying a problem to abstraction, decomposition, pattern...
Teacher Resources (new)
A4 Machine learning
A4 Machine Learning introduces how models learn from data and the ethics of using them. It spans machine learning fundamentals, data preprocessing (HL only), machine learning approaches (HL only), and...
Teacher Resources (new)
A3 Databases
A3 Databases covers how data is structured, stored and queried in database systems. It spans database fundamentals, database design, database programming, and alternative databases and data warehouses...
Teacher Resources (new)
A2 Networks
A2 Networks explores the principles and technologies that let computers communicate. It spans network fundamentals, network architecture, data transmission, and network security. Open a subtopic below...
eBook
A4.2.3 Dimensionality Reduction
In machine learning, dimensionality means the number of features in a dataset: one feature is one column. More features sound like more information, and up to a point they are. Beyond that point, adding...
eBook
A4.2.2 Feature selection
After a dataset has been cleaned, one practical question remains: which of its columns should the model actually see? A dataset can hold dozens or hundreds of features, and many carry no useful signal,...
Activities
A 1.3.6 to A 1.3.7 Worksheet
Name: ______________________ Class: ____________________ Date: ____________________ Command terms: describe (components), then explain (applications). A closed-loop control system is shown. Label each...
Activities
A 1.3.3 Worksheet Answers
Task 1. Traces: First-come first-served (P1, P2, P3): P1 P1 P1 P1 P1 P1 P2 P3 P3 P3 Round robin (quantum = 2): P1 P1 P2 P3 P3 P1 P1 P3 P1 P1 Teacher note on waiting times, if you choose to extend: first-come...
Activities
A1.3.1 to A1.3.2 Worksheet Answers
Task 1. The four operating-system actions: finds space on the storage device; translates the file into a storage format; moves the data from RAM to storage; updates the file system. (The other two, deciding...
Activities
A 1.3.6 to A 1.3.7 Worksheet Answers
Task 1. Labelled loop: Input (setpoint) → controller → actuator → process → Output; the feedback path returns from the output through the sensor / transducer back to the controller. Task 2. Measure =...