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ASSTRACTThis study examined what children learn while they are interacting with exhibits at a children's museum as well as the conditions that facilitate learning. Using naturalistic observations to get information on the kinds of observable learning that occurred in a variety of settings within the museum, the study found that much observable learning did occur and that different contexts supported different kinds and amounts of learning. Learning was more likely to occur with adult interaction than without, and certain types of exhibits invited more adult involvement than others. Examples of learning of relatively higher levels of cognitive complexity and higher degrees of generalizability were observed more rarely than examples of learning of lower complexity and less generalibility. Implications for children's museums and other settings of informal learning are discussed. CURATOR4413JULY 2001 239

This collective case study analyzes the use of manipulatives in math lessons developed and taught by 4 groups of elementary teachers (K‐8) involved in lesson study as part of a professional development program. The study found that in three of four lessons studied manipulative use was turned into an end in and of itself, rather than a tool, and that in the fourth lesson manipulative use hindered rather than helped student learning. These problems with manipulative use by teachers in the lessons provide helpful guidance for planning of future professional development for math teaching. Our conclusion contains recommendations for successful implementation of manipulatives for both teachers and professional developers. Most importantly, we stress the need to emphasize the link between pedagogy and content, not the specific use of manipulatives.

In this article we report results of a qualitative interview study focusing on middle school Language Arts teachers' perceptions, attitudes, and reported practices related to LGBQ topics. The study found that virtually all of the teacher participants recognized that the topic of same-sex sexuality was important for their students, yet the teachers used a variety of strategies to avoid or redirect discussion of the topic. We argue that teacher responses indicate that they generally reinforced the heteronormative silence about sexual orientation and, in some cases, blocked student attempts to disrupt the norm of silence or to change the discourse. In doing so, teachers shaped (inadvertently or not) student behaviors and attitudes to fit into the heterosexist and homophobic local school community of practice. Implications for teacher education and professional development are discussed.

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