@article{carter_westbrook_thompkins_1999, title={Examining science tools as mediators of students' learning about circuits}, volume={36}, DOI={10.1002/(SICI)1098-2736(199901)36:1<89::AID-TEA6>3.0.CO;2-7}, number={1}, journal={Journal of Research in Science Teaching}, author={Carter, G. and Westbrook, S. L. and Thompkins, C. D.}, year={1999}, pages={89–105} }