Preservice preparation courses for elementary teachers of science can provide opportunities to build pedagogical content knowledge. One common concern of preservice teachers is how to cope with a preplanned lesson that does not proceed as planned. Providing opportunities for preservice teachers to experience the unexpected actually immerses them…

Presents two examples of computer-based learning developed at the Educational Technology Center at the University of California. One is concerned with scientific literacy and the other with helping students improve formal reasoning skills. Two references are listed. (Author/MBR)