Office Depot is offering a very sweet deal on the TI graphing calculators.
I would recommend the TI-84, but the TI-83 would work fine as well.
Click on one of the following links to see the different deals. Don't forget to type in the coupon code.
http://forums.slickdeals.net/showthread.php?t=874733
Office Depot offers a $25 mail-in rebate on select Texas Instruments calculators and another $25 mail-in rebate (limited to web purchases or phone in orders only) on the same calculators. Both rebates are valid on purchases through 9/13/08. Purchase an eligible calculator online using an Office Depot coupon code to achieve the following deals with free next business day delivery.
Texas Instruments® TI-83 Plus Graphing Calculator
$99.99 - $20 coupon - $25 MIR - $25 MIR = $29.99
Coupon code "42206472" (expires 9/13/08)
Texas Instruments® TI-84 Plus Graphing Calculator
$119.99 - $20 coupon - $25 MIR - $25 MIR = $49.99
Coupon code "42206472" (expires 9/13/08)
Texas Instruments® TI-84 Plus Silver Edition Graphing Calculator or
Texas Instruments® TI-84 Plus Silver Edition Graphing Calculator, Pink or
Texas Instruments® TI-84 Plus Silver Edition Graphing Calculator, Blaze Orange
$139.99 - $25 MIR - $25 MIR = $89.99
If you choose the Pink TI-84 Plus SE calculator then you can also get a free Neoprene Calculator Pouch by applying coupon code "98520083" (expires 8/30/08). Enter the coupon code here and it will add both the calculator and the pouch to your cart.