Educational technology is the study and ethical practice of facilitating learning through the use of technology. It draws from several fields including instructional technology and is based on learning theories like behaviorism, cognitivism, and constructivism. Benefits include easy access to materials, increased student motivation, and the ability to reach wider audiences. However, there are also criticisms like a lack of proper training and limited access. Common tools in classrooms include websites, blogs, wikis, and interactive whiteboards.