Featured Science Programs
ScienceSaurus® is a registered trademark of Houghton Mifflin Harcourt. Modern Chemistry® is a registered trademark of HMH Publishers LLC. Science Spectrum® is a registered trademark of Science Spectrum, and used under license by Holt McDougal. High School Virtual Physics Lab™ was developed by Polyhedron Learning Media, Inc., and distributed in conjunction with Houghton Mifflin Harcourt. Funding for this project was provided under contract number ED-IES-11-C-0029 by the Institute of Education Sciences in the U.S. Department of Education through a Small Business Innovation Research (SBIR) program. Copyright © Polyhedron Learning Media, Inc.