Berry, Ronald (ed. , Ideas For Science Fair Projects. New York: Arco Publishing Co., 1962.
Blackwelder, Sheila, Science For All Seasons: Science Experiences For Young Children. Englewood Cliffs, N.J.: Prentice Hall, Inc., 1980.
Edmund Scientific Co., Simplified Science Activities. Barrington, N.J.: Edmund Scientific Co., Booklet No. 9896.
Hawley, Robert C. and Isabel., Building Motivation In The Classroom. Amherst, Mass.: Educational Research Associates, 1979.
Kaplan, Sandra N. et al, Change For Children:, Ideas And Activities For Individualized Learning. Revised. Santa Monica, Ca.: Goodyear Publishing Co., Inc., 1980.
Linn, Marcia C., “Free-Choice Experiences: How Do They Help Students Learn?” Science Education 64: 237-248: No. 2, 1980.
Newman, Thelma R., Changeover-Breakthrough To Individualization Wayne, N.J.: Wayne Township Public Schools, Palisade Printing Co. 1976.
Wlodkowski, Raymond J., Motivation And Teaching: A Practical Guide. An N.E.A. Publication, West Haven, Conn.: N.E.A. Distribution Center, 1980.
