Which of these mathematics learning products was famously discontinued in 2018 after failing to meet sales expectations despite massive initial investment and marketing?

The mathematics education industry has evolved significantly in recent years, with new products transforming how we teach and learn mathematical concepts. From specialized calculators to advanced educational software, companies have introduced innovative tools that have changed the landscape of math education. This trivia question explores a notable retail failure in the mathematics education market that provides insights into consumer psychology and product development challenges.

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MathWhiz 3000 - An AI-powered homework assistant that promised to explain any math problem in detail but frequently provided incorrect solutions
Geometry Sphere - A 3D interactive modeling tool that was praised by educators but priced too high for widespread classroom adoption
NumberNinja - A gamified math learning app that had strong initial downloads but failed to implement an effective monetization strategy
CalculusConnect - A specialized graphing calculator with cloud connectivity that faced significant privacy concerns from educational institutions