Can anyone recommend an app for tracking grades? We're going Chromebook next year and I'm being forced out of paper grade book

I've used a paper grade book since I started teaching 8 years ago. My school is going to Chromebooks next year and I'm being forced out of paper grade book. Does anyone have any recommendations for an app to use to track grades?<br><br>I have about 100 students total across 5 classes. I don't have any smart software other than Google Classroom and Google Drive. <br><br>Looking for something super easy to use and set up. I want to be able to easily see by individual or by class. I also track student participation so I'll want to be able to add that in.