Technology continues to make inroads into high school [1] classrooms via bring-your-own device initiatives, 1:1 proposals that put a tablet or laptop in front of every student [2], and blended learning models that mix online courses with in-class instruction [3], U.S. News reports. But teachers don’t need a classroom stocked with iPads to start incorporating tech into their lesson plans. In fact, 40 percent of educators say online apps and games are the most effective [4] way to engage students, according to a reader survey by SmartBrief for EdTech, an industry newsletter. Here you’ll find three web-based resources for high school teachers to try in 2013…