To send group messages to Houses/clubs/Activity skills students, follow the steps given below:
Step 1:
        Select the Home icon, then select the
        Student Wall module. Under the Student
        Wall menu, select the Student Wall (Chat).
Step 2:
         Select the Message to Houses/clubs/Activity 
         skills students and then select the respective
         Category (House/Clubs/Activity Skills)
         accordingly.
Step 3:
        Against the Category selected, select the 
        respective group and then click on the 
        + Add Topic.
Step 4:
        Give the Topic Name and description and
        then attach the documents or files if there
        are any by clicking on Choose Files and then
        Click on Post Topic.