Keeping my lower sixth pupils focused has been a challenge at time, so I introduced the expectation of an assessed question at the end of every lesson. Rather ad-hoc at first, I've now created them as worksheets which randomly select a question leading from the exercise that has been covered in the lesson...
Which can then be self-assessed before the bell, giving pupils instant feedback on whether they have achieved the learning objective for that lesson.
Spreadsheet of questions can be found here.
