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This study was completed in partial fulfillment of the requirements for the Degree of Doctor of Philosophy at Stanford University. The direction of Professors John E. Nixon, N. L. Gage and Lyn Corno is gratefully acknowledged. The participation of teachers and students at Palo Alto, Gunn and Cupertino high schools is also appreciated. Errora and omissions remain the full responsibility of the author.
David C. Griffey is an Assistant Professor in the Department of Physical and Health School of Education, at The University of Texas at Austin, Austin, TX 78712.