The purpose of this paper is to synthesize literature related to apprentice
ship learning, the sociology of science, and K-12 science education to deve
lop a set of characteristics for designing/evaluating participatory science
learning experiences. Following this discussion, we further clarify and il
luminate the value of these characteristics for science educators by using
them as evaluative criteria for characterizing the experiences of 24 middle
school learners who embarked on a 2-week long camp with "real" scientists
engaged in "real" research. We also describe how middle school science teac
hers supported both reflection-in-practice and reflection-on-practice durin
g the camp, and how an electronic notebook was also leveraged to support bo
th types of reflection. Implications of these characteristics for science e
ducation more generally are discussed. (C) 2000 John Wiley & Sons, Inc. J R
es Sci Teach 38: 70-102, 2001.