*One game of bowling consists of 10 frames, with a minimum score of zero and a maximum of 300.  Each frame consists of two chances to knock down ten pins.  Instead of "points" in football or "runs" in baseball, we use "pins" in bowling.

*Knocking down all ten pins on your first ball is called a strike, denoted by an X on the score sheet.  If it takes two shots to knock down all ten pins, it's called a spare, denoted by a / on the score sheet.

*If, after two shots, at least one pin is still standing, it's called an open frame. Whereas open frames are taken at face value, strikes and spares can be worth more- but not less than face value.

*A strike is worth 10, plus the value of the next two rolls.

*At minimum, your score for a frame in which you throw a strike will be 10 (10+0+0).  At best, your next two shots will be strikes, and the frame is worth 30 (10+10+10).

*A spare is worth 10, plus the value of the next roll.

*The maximum score for a frame in which you get a spare is 20 (a spare followed by a strike), and the minimum is 10 (a spare followed by a gutter ball).

*If you don't get a strike or spare in a frame, your score is the total number of pins you knock down.  If you knock down five pins on your first ball an two on your second, your score for that frame is 7.