1. Bay, M., Staver, J., Bryan, T., & Hale, J. (1990, April). Science instruction for the mildly handicapped: Direct instruction versus discovery teaching. Paper presented at the annual meeting of the National Association for Research in Science Teaching, Atlanta, GA.
2. Science instruction for the mildly handicapped: Direct instruction versus discovery teaching;Bay;Journal of Research in Science Teaching,1992
3. Effects of activity-based elementary science on student outcomes: A quantitative synthesis;Bredderman;Review of Educational Research,1983
4. Is hands-on experience enough? A study of young children's views of sinking and floating objects;Butts;Journal of Elementary Science Education,1993