How many cars are there?

Brian came home from work to find that his son had his toy cars organized in a tight parking lot on our front porch. ? Below is a video version of our power point for the activity, which guides the class through steps in the activity.

Act one:  How many cars are there? Is it an array and if so, what size array could it be or what arrays are possible? How many rows and columns? What is reasonable, how much is too much

You can use the video, just beware to keep stopping the video at key points as the solution appears at the end of the video.

Act Two Handout: See the activity PDF files

Act Three: For Adventurer Members we have a PowerPoint for the activity which is easier to control than the movie and  teaching notes with solutions.