9Schneider W, Esehnmn A, & Zuccolotto A. E - Prime User' s Guide.Pittsburgh: Psychology Software Tools Inc, 2002.
10Lehrer R, Schauble L, & Petrosino A. Remnsidering the role of experiment in science education. In. K Crowley, C Schunn, & T Okada(Eds.). Designing for science: Implications from everyday, da+ssroom,and professional settings. Mahwah, N.J. : Lawrence Erlbaum A+ssodates,2001:251 - 278.