The first two weeks of the high school football season in Texas have been full of terrific matchups featuring some of the state — and the nation’s — best teams. Week 1 featured a number of pivotal games that could have major impacts come playoff time, including a handful of matchups between top-25 teams in the state rankings. Week 2 was no slouch either, with a pair of top-10 showdowns. And Week 3 might be even better, with two top-10 in-state battles and the No. 1 Duncanville facing off against national powerhouse St. Frances (Md.) Academy. Below are the key matchups to watch this weekend: Th…