Today we worked with transformations (translations, reflections, and rotations. Once again, I came across this lesson in
Interactive Math Journal from Runde's Room on teacherspayteachers.com. If you would like to watch the recording of the lesson, please visit: Transformations.
We began by preparing our journal for our notes. We wrote our learning goal:
Identify, perform, and describe a translation,
reflection, and rotation.
Next, we prepared our blank grid by labeling our x axis, our y axis and numbering our lines vertically and horizontally. We also prepared the sections where our work would be shown.
We worked with a translation first.
- We named the points of the trapezoid using ordered pairs (x coordinate, y coordinate OR run, jump).
- We translated the trapezoid 6 units east (making a very simple compass rose to remind us of directions).
- Then we named the new ordered pairs of the trapezoid that had been translated.
We moved on to reflections.
- We named the coordinates of the square in its original position.
- We reflected across Line R.
- We named the coordinates of the new placement of the square (noting that two points remained the same).
Finally, we looked at rotations.
- We named the coordinates of the right triangle.
- We rotated the triangle using Point J.
- We named the new coordinates of the rotated triangle noting that Point J's coordinates remained the same.
I closed each lesson by asking the kids to talk to me about their new learning. Someone in each class was happy that I had shown how to translate a figure so many units in a given direction. Others really liked rotating the triangle. They thought it was funny that I used a compass rose in math and taught them my memory device (Never Eat Sour Watermelon). I noticed that this was a good catch for some students who are still working the coordinates backwards by going up the y-axis and then going across the x-axis. They all really enjoy getting to cut, tape, and use map pencils!
HOMEWORK: Countdown 5.6