1) Ashcan, etc 2) Bass groups 3) Brown and Rice, for two 4) Colleges 5) Colleges and universities 6) Cultural institutions 7) Educates 8) Educational institutions 9) Elementary institutions 10) Fish groupings 11) Fish groups 12) Fishy groups 13) Grouper groups 14) Groups of fish 15) Groups of groupers Found on https://www.crosswordclues.com/clue/schools