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The 2 Sigma Problem: The Search for Methods of Group Instruction as Effective asOne-to-One TutoringBenjamin S. BloomEducational Researcher, Vol. 13, No. 6. (Jun. - Jul., 1984), pp. 4-16.Stable URL:

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References

A Meta-Analysis of the Effects of Advance Organizers on Learning and RetentionJohn Luiten; Wilbur Ames; Gary AckersonAmerican Educational Research Journal, Vol. 17, No. 2. (Summer, 1980), pp. 211-218.Stable URL:

http://links.jstor.org/sici?sici=0002-8312%28198022%2917%3A2%3C211%3AAMOTEO%3E2.0.CO%3B2-Q

Reading Instruction: A Quantitative AnalysisSusanna W. Pflaum; Herbert J. Walberg; Myra L. Karegianes; Sue P. RasherEducational Researcher, Vol. 9, No. 7. (Jul. - Aug., 1980), pp. 12-18.Stable URL:

http://links.jstor.org/sici?sici=0013-189X%28198007%2F08%299%3A7%3C12%3ARIAQA%3E2.0.CO%3B2-9

Cooperative LearningRobert E. SlavinReview of Educational Research, Vol. 50, No. 2. (Summer, 1980), pp. 315-342.Stable URL:

http://links.jstor.org/sici?sici=0034-6543%28198022%2950%3A2%3C315%3ACL%3E2.0.CO%3B2-E

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