Reinforce Concept in Different Contexts

Keep coming back to the curly arrow concept, in terms of reinforcing it in different contexts. For a first-year course that’s about 20 lectures, introduce the curly arrow concept in lectures four to seven, then revisit it every lecture thereafter. For 13 or 14 lectures, it would come up in some different form - different examples, different ways of using it, referring back to the original concepts, reiterating the vocabulary, the language that's being used.