How many yards do you have to get before earning a first down?

Hmm.

Explanation:

10 yards

Each time the offense gets the ball, it has four downs, or chances, in which to gain 10 yards. If the offensive team successfully moves the ball 10 or more yards, it earns a first down and another set of four downs.

because health skills are tools and strategies and also practical skills are also something you need to learn (like tools and strategies) and put it in reality.