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Enter the graphing calculator’s serial number to receive your contest redemption code.*





*Valid with new TI-84 Plus CE, TI-Nspire™ CX or TI-Nspire™ CX II graphing calculators purchased from an authorized retailer or dealer beginning May 2019, only. Each serial number may only be redeemed once. Limit one redemption per person.

How to find the serial number

TI-84 Plus CE graphing calculator

Locate the serial number on the back, engraved directly above the Texas Instruments logo. The code will be in the following format: XXXXXXXXXX X-XXXXX. (Make sure to include the dash in the second set of numbers, following the L. Serial numbers do not contain the letter O; use zeros.)

TI-Nspire™ CX graphing calculators

Locate the serial number on the back, engraved at the top. The code will be in the following format: XXXXXXXXXX X-XXXXXX. (Make sure to include the dash in the second set of numbers, following the N. Serial numbers do not contain the letter O; use zeros.)


Need help? Please contact ExtraCreditContest@ti.com with questions or issues.
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