This lesson provides students with the opportunity to explore the TI-84 graphing calculator in conjunction with Microsoft Excel. Students can use the "Stretching Slinkies" worksheet to record and enter data. They will either: enter data into Microsoft Excel to synch with the TI-84, OR, enter data directly into the TI-84. Students will then produce a scatter chart using the TI-84. Extension work can include varying the type of charts (bar, line) or entering data from a variety of experiments.