Lesson tool reports can be accessed within the activity if questions have been included in the build phase.
Steps for assessing a lesson
You can review two components of the lesson tool: attempt by user (including date and time) and grades (if enabled during initial set up).
Reports can be accessed in the lesson tool, next to the edit tab.
Grades can be set up in the tool settings to report into GradeBook. Grades can only be generated for lessons with at least one question. Grades are only calculated when a student has completed the lesson.