Go to your course

·          From your navigation block, click Reports> Course participation

·          From the drop down list, choose your quiz.

·          In Show only, choose "Student" and in Actions, choose "post"

·          GO

·          In the list that appears, the students who have not submitted a quiz will have NO in the Post column

·          Select the boxes next to those you wish to message.

·          In the bottom dropdown With selected users, choose Send message, then OK

·          Add the message you wish to send (don't forget there is a spell checker!), and check the list of currently selected users.

·          Click Preview the message

·          If the message looks correct, select Send message