The Graphs We Need 3: Attention vs. Time in Your Presentatation

This is what happening to attention, the longer we talk. Boost attention by talking for less time and by building 'spikes' into that presentation e.g. some audience participation. 

The graphs we need 1: the inverted 'U' and diminishing returns.

The graphs we need 2: learning and the staircase.

Bonus: Love Presenting, Hate (badly used) PowerPoint