But if the visuals are only included to make the materials “pretty,” the learner will waste cognitive energy processing the visual material without gaining new information or meaning.
I have noticed I feel like I have a more limited cognitive load space during lectures when my professor uses really active slides. I've gotten distracted or lost during instruction before, and felt like a "bad" student. As pretty and fun as they are, animations often distract me, and it can be hard to note-take when the audio doesn't match the transcriptions, as mentioned above. This felt validating!