We’ve reached a critical part of high school football season in Indiana as teams begin jockeying for playoff position in the next few weeks, and On3 is tracking scores from around the state. A couple of huge matchups are on tap over the next few days, including a top-five battle between Center Grove and Lawrence North. And that’s in addition to five other ranked matchups and 24 of the state’s top 25 teams in action. Follow along below: 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 team…