If your students are using the Dell Chromebooks I have some news about a feature that you might be of interest to you. If you have ever looked at the outside cover you might have noticed a small light. This is the Dell Activity Light and it allows your students to interact with you without saying a word. I pushed the app to all of our students so it will appear no matter what model Chromebook they are using, but it will only work with our Dell Chromebooks.
When the student clicks the app which is pinned on their tray, a box will pop up that gives them several options. Students can select which color of light to display depending on their need. For example, if they have a question they can select the option to turn their light red. There are times when it is desirable maintain a quiet classroom and this app allows us to do that. When students are working on individual work that requires concentration this app would allow students to indicate they need help without disrupting the entire class. I can see how this could be used to triage questions as well. Individual teachers could work out a system where the colors mean different things. Perhaps a red light might mean a student agrees with an answer while a blue light means they disagree.
Please let me know if you are using this with your students. I'd like to know how it is going.