Sent in by a denizen of various lists I'm on:

I'm running a group on the GreekStudy list (to roughly coincide with
high school summer vacation!) going through all of the simple Greek
composition book, Elementary Greek Exercises by Hillard & Botting.
The book covers all (or most) of first year Greek morphology, while
keeping vocabulary and sentence constructions quite basic (so it
should be ideal for a pinpoint review of morphology ... I know my
grasp of Greek morphology is rapidly rushing from my brain!).

I've run summer groups like this in the past (going through the Pharr
book, and the Anabasis), and they were a lot of fun! Please see the
group's website for details:

Let me know if anyone has any questions.