These resources are part of a series that I am preparing in support of Professor David Hestenes's goal of using Geometric Algebra(GA) to integrate high-school algebra,geometry, trigonometry, and physics into a coherent curriculum.
Resources prepared by Professor Hestenes and Robert Rowley
http://geocalc.clas.asu.edu/GA_Primer/GA_Primer/
http://geocalc.clas.asu.edu/GA_Primer/GA_Primer/introduction-to-geometric/high-school-geometry-with/index.html
Wiki for collaborative development of pre-university materials on GA
http://preuniversitygeometricalgebra.wikispaces.com/
LinkedIn group for the same purpose:
Pre-University Geometric Algebra
https://www.linkedin.com/groups?home=&gid=8278281
