Custom tasks allow teachers to pick the questions they want their students to complete. They are particularly useful for revision and assessment tasks as you can pick from multiple subtopics, topics and curricula.
You can assign them to individual students or whole classes, pick the start and due date, the expiry date, question variation and whether students can use hints and videos. This video explains how.
When creating a task, you can search for topics within your chosen Curriculum using the search field. If you can't find something, try using the World of Maths curriculum.