myPeekaville is exclusive to elementary (PreK-5) students and cannot be accessed by secondary school students. If you need certain students to have access to myPeekaville, then you would either need to create a new elementary level classroom for them in Google Classroom, Clever or ClassLink and then roster them into Peekapak through that classroom, or you can create an elementary classroom in Peekapak and manually add them into the classroom.