To easily transfer files from school computer to home computer and back, you'll need to setup Google Drive for Desktop. There's a few steps involved, but nothing too difficult.

Implementation steps are below, but here is an overview page of what it is, how to install and configure, and what it can do: https://support.google.com/drive/answer/10838124?hl=en

Drive for Desktop is already installed on the school computers, but you will need to configure it once. Find the Google Drive application in the Applications folder. Double-click and follow the instructions to log in and configure.
I recommend you log in with your PUSD stu.powayusd.com account for authentication.
Set up the folder(s) on the school computer that you want to sync. You can configure that during setup or after in the Drive for Desktop preferences found in the task bar of your computer (upper right on Mac, lower right on Win). I suggest you create a new folder in your Documents with the title of the class you are taking.
At home, download and install the application for your type of computer and follow step 2 above.
Mac | Windows
You will find the sync folder you shared from the school computer in the Google Drive folder located on your computer in the favorites section on both Apple Finder and MS Explorer windows.