If you are using the Shaw Academy app, then, you may have subscribed to receive push notifications which you can disable from the phone settings itself.
For iOS devices:
On your iPhone or iPad, go to the Settings app and select Notifications. Scroll down to the app that you would like to disable and select it. There will be multiple On/Off sliders - be sure to drag each one to the Off position.
For Android devices:
On your Android device, tap Apps > Settings > MORE.
Tap Application manager > DOWNLOADED.
Tap on the app.
Select or clear the check box next to Show notifications to enable or disable push notifications.