Sounds very interesting! But how will we be able to test it, will there be Schoolwork for macOS (I didn’t find it in Beta 1) or will Mac Apps with ClassKit show up in Schoolwork on iPad?
ClassKit for macOS & Catalyst
Here is what you can do to verify if your app's ClassKit integration works as expected on macOS. Assuming that you have the same app available for iPad and macOS and that you have a test org account on ASM.
Assign a handout to a student using an iPad with an activity in your app.
Log in to that student account on macOS.
Launch the macOS version of your app
Go through the assigned activity
Progress should be reported for this activity and should be visible in System Preferences -> Class Progress
Teacher should see the progress on the iPad.