The exercises (and keys) for each lesson are numbered by the section within Homeric Greek; e.g. §8.3 (in the list of exercises in Lessons 01-05) means a) it is associated with material in §8 and b) it is the third exercise posted for this section.
We recommend encouraging students to complete exercises and correct their own work with the idea that some parts of an exercise may appear on a quiz.
Many of the same (or similar) exercises are also available in interactive form.