Use course tools>>Virtual Classroom>>Manage Virtual Classroom
You can control the functions students can perform in a Virtual Classroom. To do so:
Click the access control panel tab to the far right:
On this panel, you can specify whether students can ask questions, enter the chat, draw on the whiteboard, or navigate. For each of these functions, select one of the following:
All – Students have access to all functionality.
Floor – Students with the floor have access to this functionality.
None – Only you can perform the function.
Note: Use the buttons to the right of the list to give or take away the floor. You can also click the directory button to view information about a selected student.