I loved using this activity as part of an introduction to the vertical motion model. This activity should be used after graphs of quadratic equations have been introduced and explored. I found that students were able to work best through the activity in pairs, following a brief introduction of the topic and an actual model of tossing a ball to each other in class and discussing the factors that affect the shape of the parabola. This product is in Word format so that you can personalize for your students. Enjoy, and please leave a review if you use this product! Thanks!