Which innovative retail strategy did Texas Instruments use in the 1990s that helped their TI-83 graphing calculator dominate the education market for decades?

Graphing calculators revolutionized mathematics education in the 1980s and 1990s, becoming essential classroom tools. These devices created an entirely new product category and marketing approach for mathematics education. This poll tests your knowledge about one of the most successful retail strategies in educational mathematics technology.

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They created educator ambassador programs, providing free calculators and training to influential math teachers who then recommended them to students
They implemented a subscription model where schools paid an annual fee for updated calculators and software
They offered significant student discounts through a direct-to-consumer online store, bypassing traditional retail channels
They partnered exclusively with one major textbook publisher to ensure all math problems were optimized for TI calculators