5TATYANA DUMOVA.A project in group counseling with high school underachievers[J], Counselor Education and Supervision,2012,3(1) :24--28.
6GIULIANA Dettori, MICHELA Ott. Looking beyond the performance of grave underachievers in mathematics[J],Intervention in School and Clinic ,2006,41(4):201--208.
7MITCHEL Carroll.Task-Analysis procedures in mathematics instrueti-on of achievers - amp undera- chievers[J], School Science and Mathematics,2010,73(7) .578--584.