Possible Clues:

• Grps. concerned with class struggle?
• School bake-sale groups: Abbr.
• Elem.-school orgs.
• Class-conscious ones
• K-12 fund-raisers
• Sch. fund-raising gps.
• Elhi support gps.
• Ed promoters
• After-school grps
• Mom-and-pop grps.?