Johnson, David W.,  1940- <br/><br/>
Learning together and alone :  cooperative, competitive, and individualistic learning / 
David W. Johnson, Roger T. Johnson. 
 - 4th ed. 
 - Boston :  Allyn and Bacon,  1991. 
 - 242 p. :  ill. ;  24 cm. 
<br/><br/>references p. 223-227 
<br/><br/><label>ISBN: </label>0205155758  RM70.20 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Group work in education.<br/>Individualized instruction.<br/>Interaction analysis in education.<br/>Lesson planning.