Electronic materials are digital resources like web pages, CD-ROMs, or printed materials that teachers create for students to use on computers or other devices. They can include external web pages, web design, small programs, or materials created with CD-ROM production software. Teachers produce electronic materials to reinforce classroom lessons, provide additional practice, and engage students, as well as to recycle or share the materials. The process involves adapting existing print materials, uploading exercises to a central repository, and using an authoring tool like Hot Potatoes to create content that can be distributed digitally or physically to learners.