How well do you know the NFHS rules for high school sports? Using the NFHS Rules app you will be able to find out! “NFHS Rules” allows official NFHS rule questions to be sent directly to your mobile device allowing you to challenge your rule knowledge and keep you aware of different situations for your chosen sports. For the sports that you subscribe to, it not only allows you access to the NFHS Rules but you can also gain the valuable knowledge found in the Case Books of your sports. “NFHS Rules” app contains all the information found in the printed copy, but adds the key advantages of not only portability but the digital format also allows quick and easy searches to be performed.