Mr. Salazar: Today you're practicing hands-only CPR on these training dummies. This is for a teenager or an adult who suddenly collapses and isn't breathing normally.

Mr. Salazar: Step one. Make sure the area is safe for you. Step two. Tap the person's shoulders and shout, are you okay? If there's no answer, don't just yell for somebody to get help. Point at one person and say, you, call nine one one.

Mr. Salazar: Step three. Kneel beside the person. Put the heel of one hand in the center of the chest and your other hand on top. Lock your elbows and push hard and fast, about two inches deep. You're aiming for one hundred to one hundred twenty pushes a minute. That's faster than most people expect, so I'll play music with that same beat while you practice. Keep going until help arrives or someone trained takes over.