In the example lessons, students are given the input as a whole class
Children then self-select the task they feel best suits their confidence with the content.
If they feel the challenge they picked was too hard or too easy, they are free to go back and pick another one.
Children were taught to challenge themselves but also not feel ashamed of picking the easier challenge if they want to.
They can work through all 3 challenges during the lesson if they wish so can build confidence during a lesson.