This lesson provides a transition from exponential growth to decay, with the models moving from simple ratios and integers to more complex decimals. Move from concrete to abstract. Students use experiential activities with manipulatives to create simple tables. Then they discuss patterns, which are then translated into mathematical models. Break tasks and instructions into small steps.
Students generally have to remember only a few things to do at each point.
In many cases, tasks are divided still further so that each student has a part of the task. The teacher models how to fold the paper, how to set up and label tables, and how to set up and label graphs. It is also clear from the comfortable way in which students carry out routines that these had been well established. Use and expect precision in language. Clarity is essential in giving and understanding instructions as well as communicating understanding.