Here is a quick presentation to share letting you know about the use of “challenge boards”.
They essentially work as mini-plenary tasks or tasks at the end of the lesson. It is important that students have learning that they can apply to the task so I wouldn’t recommend use in the first 15-20 mins of the lesson. The tasks are metacognitive so use the idea of learning about learning. They are easy to create and something which is a go to for pupils who have a bit of spare time and like a challenge. You can also do some topical questions! They can glue them in their book and work as a pair as well.