A project with a variety of exercises that will help you learn development.
Complementary excercises for practising web development and the ZtM course. Not a list of resources, but a library of excercises! Add excercises for each category: html, css, js, react, testing, etc... They could then have a button that will show you the solution. If you have any good ideas feel free to add them!
(idea by Thijs @ Zero To Mastery)