Journal of Computers in Mathematics and Science Teaching Volume 23, Number 2

In this Issue: 5 Articles

	Visualization for Middle School Students’ Engagement in Science Learning Lauren Cifuentes & Yi-Chuan Jane Hsieh, Texas A&M University, USA pp. 109-137
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	Science Education in the Web Era Leon L. Combs, Kennesaw State University, USA pp. 139-149
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	Considering the Efficacy of Web-based Worked Examples in Introductory Chemistry Kent J. Crippen & Boyd L. Earl, University of Nevada Las Vegas, USA pp. 151-167
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	Complex Quantification in Structured Query Language (SQL): A Tutorial Using Relational Calculus Jalal Kawash, American University of Sharjah pp. 169-190
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	Working with Accurate Representations: The Case of Preconstructed Dynamic Geometry Sketches Margaret Sinclair, York University, Canada pp. 191-208
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