Which innovative marketing strategy helped Texas Instruments maintain the TI-84 calculator's dominant market position in schools for decades?

Texas Instruments' TI-84 graphing calculator has dominated mathematics classrooms for decades, despite minimal hardware updates and a price point that has barely changed. This product marketing phenomenon showcases how educational adoption, strategic positioning, and curriculum integration can create extraordinary product longevity. Test your knowledge about this mathematical retail success story that defies typical technology product lifecycles.

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Creating a comprehensive teacher training program that provided free calculators and curriculum materials to mathematics educators
Implementing a subscription-based model where students pay monthly for calculator access through a mobile app
Continuously updating the hardware with cutting-edge technology every year to stay competitive with smartphones
Offering significant educational discounts directly to students through an online loyalty program