Press and quickly release the volume button closest to the power button.

Press and quickly release the volume button furthest from the home button.

Press and hold the power button until the white apple logo appears on the screen. 

Before state tests such as IAR and MAP Testing!

When your iPad is frozen or not responding when you try to click on things

Ask your teacher if it's just your iPad or a larger/school-wide issue

Go to Settings

Try clicking "MiddleNorth-Students" and reconnecting

Try force restarting your iPad