Elissa Miller is the chevron-obsessed teacher and blogger found at misscalculate.blogspot.com She is currently in her 10th year of teaching, blogging, and tweeting. As the only teacher at a small southern Illinois school, she teaches Algebra 1 through Trig. Her current obsessions are Google Classroom and brag bracelets; her old obsessions are interactive notebooks and card sorts. One of her teaching strengths is breaking down concepts into smaller pieces, making it easier to address misconceptions. This session is the culmination of those small pieces when teaching congruent triangle proofs. See all the ideas she's ever tried as she scaffolds students up to writing full proofs.