This is the users training, not the developers training.
This application is really running two Pyodides. One in the main window, on every key stroke it does syntax checking by compiling the code. The other one is in the iFrame for running the REPL and programs.
1. Show it really is Python
2. Try out an obscure Python command.
3. Sign up for my advanced Pyodide class.
4. Homework. Get turtle graphics working and share the code.
5. Confirm that it misbehaves just like Python.