Even with the best-laid plans, you cannot anticipate perfectly how every single minute of a class session will play out. Sometimes things will run long, other times short. The question is what to do when you have a few spare minutes and do not have time to launch into new material. Planning ahead by creating a short activity that may last between one and five minutes can help you fill potential gaps with a meaningful learning activity. Such an activity is called an Extension because you can use it to add on to your planned material to extend the teaching and learning time.

Extensions activities help you to prepare fully and to ensure that students do not find themselves with nothing to do. When done well, ...

Get Interactive Lecturing now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.