If you really want a web IDE, then I'd suggest: https://vscode.dev/ But if what you really want is just having access to your project from multiple devices, use Git and a host like GitHub or GitLab to make it easily accessible. Assuming you can install Git on the school computer, that is. More on reddit.com

There are bunch of online Python editors that I have found, but none of them have any modules available. Are there any IDE's available online that have simple modules such as math and random built in? More on stackoverflow.com

There's Github codespaces. Which is basically VSCode in the cloud. Free accounts get 15 GB of storage and 120 core hours free a month. You can probably get more being an educator and part of a nonprofit. EDIT: I just had a quick look, it has python setup out of the box, terminal access, choice of themes, extensions, etc. Probably the biggest hurdle is that you need to select a repository as a template to load up a codespace. Up to you if you want to roll git into it as well. But there is a blank template as one of the default choices that gets it running quickly. Though I think you might need to have a repository to commit to if you want to save projects long term. EDIT EDIT: Nope, you can set a codespace to remain indefinitely. So no problem there either. It will timeout by default though, you need to turn off the autodelete for each codespace you want to keep. More on reddit.com

If you're using github, vscode.dev is all baked in. Just hit "." in your repo, and you'll open up the repository in VSCode. To compile and run, you'll need a codespace, which github lets you use 60 hours of a month for free. Thing is... VSCode even running in a browser is running on your laptop. It's almost all client side. So it's not going to run a lot better, if any better. But... even low end laptops are pretty capable of running an IDE like VSCode, and compilers for Java, KT and Python... and C/C++, node, rust, go, etc. It's when you start running emulators for things like android development that things start to get hard to do on lowend hardware. The work around here, is to deploy to your device instead of an emulator. What a lot of people have good success with is installing a lighter OS than windows on their lower end laptops. Linux Mint Xfce is a common option for older machines. And, you get the added bonus of learning a bit about unix like systems, which will probably be useful for most careers in the industry. More on reddit.com