TY  - BOOK
AU  - Slavin,Robert E.
TI  - Cooperative learning: theory, research and practice 
SN  - 0131725947
PY  - 1990///
CY  - Boston
PB  - Allyn and Bacon
KW  - Group work in education
KW  - Team learning approach in education
KW  - Evaluation
ER  -