This project explored the effectiveness of an educational technology called peerScholar, which is an online peer-assessment tool used to enhance student learning. To date, all of the findings on peerScholar have focused on the development of critical thinking skills at the University level. However, given that learning begins earlier, the proposed research will examine the effectiveness of peer-assessment, via peerScholar, throughout Grades 9 to 12. The goal Is to replicate, and to extend, the peer-assessment findings with younger students.