Lesson

When you create a Lesson one of the options asks you whether you want to average the grades from multiple attempts at the lesson or to use the maximum from those attempts. The "How to..." lesson here is set to display the average grade.

I agree that the information back to the teacher about the operation of a Lesson is a bit spartan (to say the least ). Remember this module is under development and one of things it needs is a teacher's "admin" page to show how things are going. (The Exercise and Workshop modules do have Admin pages which show lots of things to the teather.) Another development on the table is the analysis of answers (similar to the what the Quiz module does now).