Factlen ExplainerAI TutoringExplainerJun 13, 2026, 8:00 AM· #1 of 37 in education

How AI Tutors Are Finally Solving Education's 40-Year 'Two Sigma' Problem

For decades, researchers knew that one-on-one tutoring dramatically improved student performance, but scaling it was financially impossible. Now, a new generation of generative AI tutors is delivering comparable learning gains for less than $50 a year.

By Factlen Editorial Team

EdTech Optimists 40%Pedagogical Skeptics 30%Academic Researchers 30%
EdTech Optimists
Advocate for rapid deployment of AI to democratize one-on-one tutoring.
Pedagogical Skeptics
Emphasize the irreplaceable nature of human emotional connection in teaching.
Academic Researchers
Focus on measuring empirical learning gains and cost-effectiveness.

What's not represented

  • · Students using the platforms
  • · Parents managing screen time

Why this matters

Personalized one-on-one tutoring has historically been a privilege reserved for wealthy families, leaving the majority of students to rely solely on one-size-fits-all classroom instruction. By dropping the cost of a personal tutor to roughly $24 a year, AI platforms are democratizing access to mastery-based learning and fundamentally leveling the educational playing field.

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