Click Tools |Student Merge and search for the name(s) you want to combine. Once you have found your students, select the first student to be the Primary record and the second student to be the Duplicate record. The contact details and other details from the Primary will follow the account, but the final Merged record will retain a record of activity. Review your selection, Preview the Merge and click Save.
NOTE: This article walks you though the process in classic ASAP. For instructions in the latest version of ASAP, see Merge duplicate customer records.