Google Groups is an online tool that allows users to form online communities to communicate and interact over the internet. Teachers can use Google Groups to communicate with students by providing instructions, study notes, homework, and integrating other online resources. This provides students with 24-hour access to course materials as long as they have an internet connection and a Gmail account. Google Groups offers a free and user-friendly platform to facilitate online discussion, resource sharing, and communication between teachers, students, and parents.