This document discusses technology integration in teaching based on the 3Es framework: effectiveness, efficiency, and enhancement. It introduces Unit 2 of the EDUC W200 course, which focuses on how teachers can implement technology in the classroom to best support learning. The 3Es are defined as using technology to meet learning goals (effectiveness), save time and resources (efficiency), and provide engaging learning experiences (enhancement). Examples of tools that achieve the 3Es for different learning objectives are provided.