["EDUCATION \/ Professional Development","EDUCATION \/ Teaching Methods & Materials \/ General","EDUCATION \/ Teaching Methods & Materials \/ Mathematics","Individualized instruction.","Mathematics;Study and teaching (Elementary)","EDUCATION \/ Professional Development","EDUCATION \/ Teaching Methods & Materials \/ General","EDUCATION \/ Teaching Methods & Materials \/ Mathematics","Education","How-to\/Do-it-yourself","Individualized instruction.","Mathematics;Study and teaching (Elementary)","Non-Fiction","Professional","Study and teaching","TEXT","United States"]