Which marketing strategy was primarily responsible for making the TI-83/84 graphing calculators the dominant product in secondary mathematics education in the United States?

The market for mathematical software has evolved significantly over decades, transforming how educators teach, students learn, and professionals apply mathematical concepts. From early calculators to sophisticated computational platforms, these products have shaped mathematical practice across industries. This trivia question focuses on how specific product marketing strategies influenced the adoption of mathematical software in education.

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Creating textbooks and curriculum materials that specifically referenced TI calculator models
Offering the lowest price point compared to competing calculator brands
Being the first graphing calculator available on the consumer market
Including built-in games and entertainment features that appealed to students