In the recursion lessons, concepts are discussed through examples and graphs. Students are able to see the effects of different parameters in sequences and series. The recursion activities allow the students to run a simulation, seeing recursion in action. They will also be able to create and adjust recursion equations and graphs.

1. An Introduction to Arithmetic and Geometric Sequences
   This lesson is designed to introduce students to the idea of an arithmetic sequence. Students will create sequences, then experiment with varying the starting number, multiplier, and add-on values used to produce the sequence.
   Related Activity: Sequencer

1. Sequencer
   In this activity, students learn about number patterns in sequences and recursions. Students chose and adjust a starting number, a multiplier, and an add-on. This sequence is then graphed according to a chosen number of steps.
2. Rabbits and Wolves
   This activity allows students experiment with a simple ecosystem consisting of grass, rabbits and wolves. As a result, students gain a better understanding of probabilities, chaos and simulation.
3. Recursion
   This is a graphing activity for recursive equations. The user enters up to three recursive equations in the form u_n equals some operation involving u_n-1. When the user is ready to graph the equations, all the equations can be seen on one graph. The values of the points can be viewed in a seperate data chart or on the graph by moving slider bars along the graph. The user may change the window of the graph, flip through the equations, connect or disconnect the data points, or go back to the equations page to make adjustments and regraph.