I would prepare to start preforming CPR, but first I would check the environment and around Mr Jackson and I then ask him if he is okay. Then ask for my classmate to call 911 and get an AED. Next I would open Mr. Jackson's airway, making it easier to breath. Then I will check for 10 seconds if Mr. Jackson can breath, if he dosen't I will begin CPR. I will lock my hands on the middle of the chest and using my body weight to make 2 inch deep compressions in 100 compressions per minuite. After that I wil place the head slightly back and chin lifted to deliver 2 rescue breaths. Lastly I will continue CPR till some help comes, or my classmate finds the AED or if Mr. Jackson starts breathing.