Teachers can create a free account on snorkel.app. A free account allows you to create 20 activities, which is more than enough for most teachers. Snorkel offers a library of pre-made content, but teachers can easily create their own activities. When creating an activity, all you have to do is give it a title, type a question on the whiteboard, and configure the AI settings. The AI settings are mostly automatic, but teachers can modify them as needed.