rk over a period of time. Describing problems students encounter as they engage in inquiry and finding ways to ameliorate those problems has received considerable attention recently (Hmelo & Williams, [Special Issue, JLS], 1998; McGilly, 1994, Blumenfeld et al, 1998). In this paper, we describe inquiry in more detail, discuss ways to aid students via instructional, curriculum, and 1 . In Minstell, J. Van Zee, E. (Eds.) Inquiry into inquiry: Science learning and Teaching, American Association for the Advancement of Science Press, Washington, D.C. (in press). 2 The authors would like to thank Ann Rivet from the University of Michigan for her helpful editorial comments. 11/4/98 page 2 technological supports, and then illustrate how these have been applied to specific phases on inquiry where students encounter difficulties. What Is Inquiry And Why Use It? Broadly conceived inquiry refers to the diverse ways in which scientists stu