There will be very few changes for the 2016 season.  I thought you'd like to have a preview:

1. Mouth pieces may now be white or clear.
2. Gloves have to meet the 2016 standard.
3. Clipping has been eliminated from the free blocking zone.  It is not illegal to clip an opponent any time, anywhere.
   

NFHS Rule Changes - 2016

Football Rule Change Article - 2016