When you follow the link in the yellow box below, the activity will open in a separate window. You should then press the F11 Key to expand that window to the full screen.

Once the activity starts, you will see a title page. Click the button to Begin. On the next screen you see, look in the pale yellow box at the bottom of the screen for instructions. Also, note that there is a button in the lower left-hand corner of the screen to take you to another page within the activity. There the instructions are in a pale blue box at the bottom of the screen.

You can return to this window to review the instructions without interfering with the mapping geometry microworld. Either use the task bar, or the <Alt-Tab> key combination.