Preview the final
As a choice activity is not an official quiz, it can provide a non-threatening way to check the students' understanding of key concepts. Try preparing a variety of choice activities with questions about the most difficult concepts in a Lesson, and using them to take quick measurements of how well the students are assimilating the material. Or create a series of choices called Final Exam Questions; tell students that each of these questions will appear in the final exam, in a slightly different form, and that each will have a time limit. When the student reads the newest question, he/she is rewarded with the answer to the previous question. This can motivate students to frequently check their progress in the course.