Our basic ratings process used for various sports and levels has remained unchanged for 30+ years.  However, tackling something as large as national high school football has necessitated a few minor tweaks/fixes.  Below is a historical recounting of the changes we've found necessary to make as we've learned what special problems doing ratings for the entire country brought since beginning in 2003.

Non-Connected Teams   (three stages; prior to 2004/2005/2006 seasons)

Improved Projections   (prior to 2006 season)

Early-Season Inaccuracies   (prior to 2007 season)

State Scaling
Season Scaling   (both prior to 2017 season)