The sample for the useEffect in the explanatory slides is quite complex. Idea: Reuse the same example as in the official react beta docs (with chatroom). It is a lot simpler to understand (even though a little bit abstract).
The custom hooks slides feel a bit empty. In the sample with the custom hook, there is no hook logic inside. Add some state and potential useCallback there as well as some calculated property (i.e. usePagination?).
TODO: