This document discusses e-learning, which is instruction delivered on a computer to achieve specific learning goals. It outlines principles of e-learning design like being receptive, directive, and guided discovery. The document also notes that e-learning can have dual modalities like displaying movement through animation and supporting both operational and conceptual learning. It concludes that e-learning instruction can enable collaborative learning and that guidelines are needed for designing effective e-learning sites, as e-learning is becoming a main way of teaching given students' interest in technology.