I'm teaching an intern at work and my methodology is to push him to build full fledged projects to have a better understanding of the whole process.

The goal is to have him being capable to work at the level of a freelancer in the end.

The trick to do this is to build the same kind of app in parallel, then compare them as we do them.

Once the app is done there's also the great satisfaction of using an app you've built yourself. 😎

He's doing a book reading tracker BTW.