As fall weather and bonfires are beginning to sweep across the country, Virginia high school football is hitting the back half of the season here in the second week of October. Twenty-four of the Virginia On3 Massey Ratings top 25 high school football teams are in action this weekend with an especially loaded Thursday slate up to the plate. Follow along as On3 tracks scores from around the commonwealth. The On3 Massey Ratings — which were officially used during the BCS era and have generated college high school sports team rankings since 1995 — rank sports teams by analyzing game outcomes, str…