Go to www.kinderpedia.co go to "Management"> "Kinderpedia Modules" and scroll down until you find "Quick Messages".
When you get to "Quick Messages", click on the settings button (that little button on the left - see the picture).
Now all that remains to be done is to check "Yes" where it says "Recipients can be selected individually".
When composing a new Quick Message, you will be able to choose exactly which recipients it will reach (students, teachers, school staff).