Educators and bootcamps need fresh frontend challenges but creating good ones takes time. A library of vetted challenges with test suites could save hours.
Build a web app with categorized challenges (e.g. CSS art, React hooks) that outputs scores based on automated checks for functionality, performance and accessibility.
Sell to coding schools and corporate training programs as a subscription.
MVP: A GitHub repo with 10 challenges using Jest and Lighthouse CI.
Risk: Niche market may prefer custom challenges.