Claritas is a curriculum publishing company who has graciously allowed us to use their curriculum for the memory work portion of our co-op. It is a 4 year cycle of memory work that we use over and over again so the guides are only purchased once. They have asked that our students either purchase the memory work guides from Claritas or purchase a CrossSeven subscription (internet website subscription for all the memory work, songs, quizzes and other fun tools) if you have a student enrolled in our Approach program. These companies are affiliated with each other but are different groups.