Which innovative retail marketing strategy did Texas Instruments use in the 1990s that revolutionized the graphing calculator market in mathematics education?

In the world of mathematics education, product marketing has evolved significantly over the decades. From traditional textbooks to interactive software, companies have employed various strategies to differentiate their offerings in this specialized market. This poll tests your knowledge about a groundbreaking marketing approach that transformed how mathematical tools and resources are sold to educational institutions and individual learners.

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The T-83 Teacher Program: providing free calculators to math teachers, creating student demand through classroom exposure
The Mathematical Olympiad Sponsorship: exclusively featuring their calculators in international mathematics competitions
The Calculus Revolution Campaign: bundling calculators with popular calculus textbooks at a significant discount
The STEM Integration Initiative: creating the first calculator apps that connected to early computer lab networks