You can clear from Level 1 to late forest in under 45 minutes of focused coding. I’ve timed it. On multiple accounts. Especially with Python.
And as others have said, people going through those first levels will enhance their programming abilities, since it will re-teach them the basics. It’s great practice.
And sign-up is super easy. The system doesn’t actually check emails (as in send out an email to the email address), so you could even run them all off the same ‘main’ email address, and just do " Student1email@example.com " for example, and the system will recognize it.
Alternatively, following my previous suggestion, you could make the "Student1firstname.lastname@example.org" logins, then YOU clear from level 1 up to Forest on each account. It’d give you more practice of the basics, and it wouldn’t take long. Not more than a few hours at max, if you’re reprogramming each level by hand. If you wanted to speed it up faster (as a good programmer will do), you can simply just copy the successful scripts for each completed level into a document file, and paste them into the editor for each new account, each time you go through the levels on a new account. You could blow through level 1 - Siege in less than 10 mins on an account, if you’d have the code for each level. Probably faster. You’d only be limited by how fast you can copy & paste, and how fast your computer loads the levels