It's easy for teachers to prepare machine learning projects for students to work on together: just click on "Share" next to the project. Then students can all contribute training examples for a class machine learning model.
…in reply to @MLforKids
This is particularly useful for projects where creating training examples is time-consuming. e.g. projects that need 20 sentences to train a text ML model. 20 students can each contribute a single sentence to a class project (instead of each student typing in 20 sentences)