Visuals are best kept simple, with minimal wording. The instructor can practice using the visual aids in the actual classroom before the lecture begins. The audience's line of vision ought not be obstructed. Visual materials should be displayed only when the instructor is ready to use them and they should be kept visible until the students have finished taking notes. Effective instructors talk to the students, not the visual aids.
Interactive multimedia provides multiple learning modalities and actively involves the learner.
Most CAI relies on text and limited graphics. A heavy demand is placed on the learner's reading and visual skills. Addresses different learning styles and preferences. The incorporation of multiple modalities provides opportunities for teaching individual learners. For example, those with weak reading skills can use aural and visual skills to process verbal information.