This is a great intro to the types of triangles: acute, right, obtuse, scalene, equilateral, isosceles. You get 30 interactive slides, scaffolded to guide the students through triangle classification. For example, at first students just name triangles based on angles (acute, right, obtuse). Then, students learn how to name triangles based on sides (equilateral, scalene, isosceles). Then, students put it all together and get to practice naming each triangle with two names. There are drag and drop