Keep the reef alive
reef.science is built by a small team and supported by the people who use it. No venture capital. No ads. No student data sold. Your support is what makes free STEM education possible.
Grand Opening
October 11, 2026
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Why this exists
reef.science was inspired by Sal Khan's proof that one person with a camera and a whiteboard can change how the world learns. We are building the next version of that idea: interactive, adaptive, community-driven, and free forever. We launch on his birthday, October 11.
Engineering education is increasingly expensive. Tutoring runs $40 to $100 an hour. Prep platforms charge $200 or more per year. The information itself is not scarce. What is scarce is good practice material with clear explanations and adaptive feedback. That kind of thing has been locked behind paywalls because someone figured out students will pay when their grade depends on it.
We think that is wrong. So we are building the alternative.
What your support funds
reef.science is not a non-profit with endowment money or corporate sponsors. The platform runs on community support. Here is what that covers right now:
Hosting & infrastructure
Vercel hosting, Supabase database, domain, SSL. The platform stays fast and reliable for every student.
Content development
Building new courses, writing practice generators, creating interactive simulations. Every week the platform gets bigger.
Quality review
Every question, explanation, and lesson is reviewed for accuracy. Wrong answers in a learning platform are worse than no answers.
Student-requested features
Weak spots mode, adaptive selection, study clubs, and exam deadlines all came from student feedback. Your input shapes the roadmap.
Three ways to help
Give
Monthly or one-time on Ko-fi
Every contribution earns you a Steward badge on your profile and a matching role on our Discord server. Your support directly funds new lessons, diagrams, and features.
Steward badge on your profile and Discord role. Our heartfelt thanks.
Everything in Polyp, plus your name on this page as a founding supporter.
Everything in Coral, plus vote on which features and courses get built next.
Everything in Reef Builder, plus early access to new content before public release.
Share
Spread the reef
Tell a classmate. Share a question link. Post about it in your study group. The best way to grow a reef is to invite more life into it.
Contribute
Report bugs, suggest content
Found a wrong answer? A confusing explanation? A topic we should cover? Every report makes the platform better for the next student. Use the feedback button on any page, or reach out on Discord.
See what your support builds
1148+ generators, 20 courses, 34 exam blueprints, and counting.