Right angles are HARD to teach, am I right?! For the last few years we’ve had to teach right angles in first grade. Last year, Virginia decided to remove it from the first grade standards! Woohoo! Everyone in common core states are teaching right angles in fourth grade (way more appropriate), so these suggestions may be best used as introductions or remediation. First, we like to show them the corners of a square and have them position their arms in the same directions. Then we show them how *not* to make a right angle. No “Yay!” arms (an acute angle with both hands up toward the ceiling) and no “Ta-da!” arms (an obtuse angle with arms out to the sides).
After some explicit teaching about shapes that do and don’t have right angles, we use Morgan Clark’s memory game.
Then we created this worksheet for students to count how many right angles a shape has and draw shapes with a given number of right angles: tricky skills to master.
Finally, we have these handy-dandy right angles.