Important Message:  As you are texting 56360 number to JOIN--if you receive a message that states:  Synrevoice Alerts:  Request not processed.  Contact school to add your number. 
That error message means the number you are trying to join from does not currently exist in the system.  Please use your Infinite Campus parent portal account to process a phone number change through the portal.  The update will happen the next business night and then you will be able to opt in.