What is it?
There are four sets of four problems where students have the answer, but there are blanks in the questions that require filling in. Sounds simple enough, but the clever design of the questions makes the students think hard and prompts thoughtful conversations.
How can it be used?
The author explains in the notes how he uses these activities as starters or plenaries to his lesson to promote deep thinking and discussions. For me, they could even form the main body of a lesson.
Imagine you have taught the basics of Venn diagrams and set notation. Students know the symbols and are fairly confident at answering questions that ask them to complete and interpret Venn diagrams. This activity is perfect to help take learners' understanding tothe next level and also compels them to consider whether the question they have come up with is the only possible correct one, or whether there are a few other, or even infinitely more, questions out there.
Craig Barton was speaking to Heather Charles. He is a secondary maths teacher in the north of England.