Which innovative product launch strategy did Texas Instruments use for the TI-84 Plus that secured its dominance in mathematics classrooms?

Texas Instruments revolutionized mathematics education with their graphing calculator series. When the TI-84 Plus was launched in 2004, it employed an unusual product launch strategy that became a case study in educational technology marketing. The calculator quickly dominated the educational market despite higher-priced competitors with more features. Test your knowledge about this iconic product launch that transformed how students interact with mathematics.

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Direct partnerships with textbook publishers to include TI-84 specific examples in mathematics textbooks
A buy-one-get-one-free promotion targeting mathematics teachers to create classroom familiarity
Celebrity mathematician endorsements featuring Fields Medal winners demonstrating calculator functions
Subscription-based pricing model with yearly updates to calculator functionality