For my IB/ Precalculus class, I introduce them to the concept of a derivative by having them calculate the slope of a secant line, and then move the two points closer and closer to one another, until their limit doesn't change, accurate to 6 significant figures. This worksheet accomplishes this objective.
I use this activity within cooperative groups, and I circulate to make sure they are getting the purpose of the questions.
The file includes spiral review problems.
For this worksheet, I expect students to show their work on a separate sheet of paper.
Please download the pdf preview file first, so you can see exactly what's included; the product file is a word document, which you may personalize for your students.