Spencer Kagan
http://www.kaganonline.com/index.html

Inquiry-based learning, you can go to New York’s Public Broadcasting station, Thirteen.Org at http://www.thirteen.org/edonline/concept2class/
.

Website Resources: Active Learning

ERIC Electronic Resources: Social Studies for the Elementary and Middle Grades: A Constructivist Approach is a 480 page book of strategies employing the Constructivist approach
Go to http://searcheric.org/
and enter ED459110

ERIC Electronic Resources: Classroom Strategies for Interactive Learning, although created for middle and high schools, the lessons can be modified for elementary social studies instruction.
Go to http://searcheric.org/
and enter 448424

ERIC Electronic Resources: The Classroom Mini-Economy provides lessons, resources and simulations for economics education.
Go to http://searcheric.org/
and enter ED425112