No video, audio, or 3-D enhancements are present or use of these tools is inappropriate. Limited video, audio, or 3-D enhancements are present. In most instances, use of these tools is appropriate Some Video, audio, or 3-D enhancements are used appropriately to entice users to learn and to enrich the experience. In some cases, clips are either too long or too short to be meaningful. Appropriate amounts of Video, audio, or 3-D enhancements are used effectively to entice users to learn and to enrich the experience.
Clips are long enough convey meaning without being too lengthy.