Peel away the six rubber foots on the back of the calculator using your fingernails.

Using a Torx T6 (or TR6) screwdriver, remove all six screws.

Carefully peel the two case parts away from each other, taking turns on each side disconnecting one at a time for all eight clips. The third row from the bottom up is more secure than the others. DO NOT JERK CASE APART, THERE IS A BATTERY CONNECTOR TO REMOVE instead, slowly open the case 180 degrees with the back facing you.

Carefully wiggle the battery connector until it slides easily loose. You have now finished removing the Numworks Graphing Calculator's case.