Which marketing strategy helped Texas Instruments transform the graphing calculator from a specialized tool into a mainstream educational necessity in the 1990s?

In the world of educational products, certain innovations have revolutionized how mathematics is taught and learned. One particular marketing strategy transformed a specialized teaching tool into a household name, creating an entirely new category of educational products. This poll tests your knowledge about a pivotal marketing campaign that changed the landscape of mathematical education tools and created a lasting impact on how students interact with mathematical concepts.

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Partnering with educational boards to make TI graphing calculators mandatory for standardized testing
Creating a subscription-based software model that provided monthly math problem updates
Launching the 'Math in Minutes' campaign featuring celebrity mathematicians in TV commercials
Introducing a loyalty program where students could trade in old calculators for upgraded models at reduced prices