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B. Effect on K-12 students
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B. Effect on K-12 students
After they had acquired the background discussed in Sec. IV A, the preservice teachers modified the relevant sections of PbI and used these sections in a ninth-grade classroom. They then assessed the performance of their students with one of the post-tests in Fig. 5 共b兲. About 45% of the ninth- grade students gave a correct response 共see Table I兲. If these students had learned from teachers with only a typical back- ground, they would have likely done no better than their teachers or university undergraduates 共20%兲. Table I also contains results 共85%兲 from other ninth-grade students taught by an experienced teacher who was thoroughly familiar with both the content and instructional approach in PbI. Not sur- Fig. 5. 共a兲 Pretest and 共b兲 post-test questions on light and apertures. Students are asked to predict what they would see on a screen when assorted aper- tures are placed between various extended light source and the screen. Table I. Percentage of correct responses on pretest and post-test questions on light and apertures. Pretest results are from a question about a long-filament bulb and a triangular aperture 关see Fig. 5共a兲兴. Post-test results are from questions about various light sources and apertures 关see Fig. 5共b兲兴. The preservice teachers had worked through the relevant sections of PbI before modifying the curriculum. The experienced inservice teacher was thoroughly familiar with the content and with the PbI approach. Pretest Post-test Undergraduates and preservice teachers 共9-12兲 Graduate TAs Preservice teachers 共9-12兲 Ninth-grade students after standard instruction after standard instruction after PbI after PbI 共modified by well-prepared preservice teachers 兲 after PbI 共modified by very well-prepared inservice teacher 兲 N ⬎2000 N ⬃110 N ⬃60 N ⬃55 N ⬃55 20% 65% 85% 45% 85% 766 766 Am. J. Phys., Vol. 74, No. 9, September 2006 McDermott et al. Teacher Education in Physics 151 prisingly, when experienced teachers have intensive prepara- tion in the physics involved, the quality of student learning is even better. Download 231.88 Kb. Do'stlaringiz bilan baham: 
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