These six principles are distilled by staff of SEDL's Technology Assistance Program(TAP) from a variety of sources on constructivism, brain research, and education research, as well as staff members' experiences as teachers, learners, and observers in classrooms. Many of the resources used can be found in TAP's literature review, Constructing Knowledge with Technology (Boethel & Dimock, 1999). This classroom example was modified from a unit developed by Sharon Roy, Michelle Garza, Jayne Kennesson, John Schwertner, and Trish Leal of Kealing Junior High School in Austin, TX. See Perrone, p. viii. This mathematics activity, based on examples from the National Council for Teachers of Mathematics's Curriculum and Evaluation Standards for School Mathematics (page 37), was presented in the fall 1994 (Vol.1, #2) issue of Classroom Compass, an information bulletin of the Southwest Consortium for the Improvement of Mathematics and Science Teaching (SCIMAST), a SEDL project. See Wissick. Also Interactive Educational Systems Design, pp. 9, 14, and 35. Adapted from a Winnipeg (Canada) school. For more information, contact dfaulk@minet.gov.mb.ca. Used with the permission of Harrison Payne, geography teacher, Omaha North High School, Omaha, Nebraska. See "The Hidden Ecosystem in Omaha" (As of 2012, the link no longer works - http://www.ops.org/north/curriculum/socstudies/socstudies.html) on the Omaha Public Schools website. Adapted from Susan Boone's lesson, "A Functional Housing Market". This lesson was authored and conducted by Dwayne Carlock at Block (Louisiana) High School. It is used with his permission. For further information, contact him at dcarlock@cath.nls.k12.la.us. McDaniel, p. 75. Grade level and subject area are unavailable. Definition furnished by the U.S. Department of Housing and Urban Development. Adapted from Gottfried and McFeeley, p. 10.