https://www.digitaltechnologieshub.edu.au/teachers/lesson-ideas/introduction-to-binary

The above link is a resource that aims to assist beginners to plan,  explain, and teach their lessons on binary.
In teams, students quickly work together to convert five binary numbers into decimal numbers. When complete, the group shouts ‘stop’ and receives a time. The students are racing their peers. As a class they then come back together and discuss the answers and how they got them.