Audio and video recordings featuring educational materials in the field of physical sciences, history, mathematics, economics, psychology, government studies and language instruction for K-12 education as well as for standardized test preparation; Downloadable video recordings featuring educational materials in the field of physical sciences, history, mathematics, economics, psychology, government studies and language instruction for K-12 education as well as for standardized test preparation

Audio and video recordings featuring educational materials for secondary and post-secondary education as well as for standardized test preparation.; Downloadable video recordings featuring educational materials for secondary and post-secondary education as well as for standardized test preparation

Audio and video recordings featuring educational materials in the field of physical sciences, history, mathematics, economics, psychology, government studies and language instruction for K-12 education as well as for standardized test preparation; Downloadable video recordings featuring educational materials in the field of physical sciences, history, mathematics, economics, psychology, government studies and language instruction for K-12 education as well as for standardized test preparation

Audio and video recordings featuring educational materials for secondary and post-secondary education as well as for standardized test preparation.; Downloadable films and movies featuring educational materials for secondary and post-secondary education as well as for standardized test preparation. provided via a video-on-demand service