This is a project I have done a few times during the Aseret Yemei Teshuvah. It is very easy and straightforward. It exposes students to many of the basic ideas of Teshuvah and has them focus on Teshuvah through self-guided learning. It is not intended to be a thorough learning of Rambam Hilchot Teshuvah, but it is a quick and engaging way of teaching students the basics of Teshuvah.
Here are the project details and the Rambam broken down by Perek (with English translation from Chabad.org)
Rambam – Hilchot Teshuva assignment
Here are some submissions from my class last year: