What feature allows teachers to communicate with students in Google Classroom?

The feature that allows teachers to communicate with students in Google Classroom is the Stream. The Stream serves as a central hub for announcements, class discussions, and updates, providing a space where teachers can post messages, share resources, and engage with students in real time. It is designed to facilitate communication and interaction within the classroom, allowing teachers to keep students informed about important information and foster a sense of community.

While assignments are a critical feature for distributing and managing coursework, they do not serve as a primary communication tool. Classroom settings pertain more to configuring the classroom environment and managing permissions and visibility, while the calendar is mainly utilized for scheduling and tracking assignments and due dates rather than for direct communication. Thus, the Stream is the most effective tool within Google Classroom specifically for communicating with students.