The document discusses how the brain learns and retains new information over the course of a learning episode. It shows that retention is highest at the beginning (prime-time-1) and end (prime-time-2) of the learning period, but lowest in the middle. An activity demonstrates this primacy-recency effect, where participants recall the first and last items best but struggle with middle items. The implications are that new material should be introduced at the start of class, practice and review occur during the middle downtime, and lessons conclude by consolidating learning. Strategies help maximize retention by accounting for how attention and memory function over time.