Whisper by EdTechTeam lets you send quick messages to your class without interrupting the work. Whisper imports your list of students from Google Classroom, making setup super easy. Each message a teacher sends is also sent to his or her email (and automatically marked read and archived) so that Whisper is compliant with districts that archive teacher emails. 
Whisper by EdTechTeam
Source: Whisper by EdTechTeam – Chrome Web Store
