Deep Optimism
Focus on Foundations is a 501(c)(3) nonprofit. We build learning tools and source-backed AI Q&A, including a math fluency quiz and conversations grounded in David Deutsch interviews.
A hand with the next step
Your agent
An assistant that works on this website with your account.
Meet your agent- Find lessons and pages, and show you how to get there.
- Read and save your documents.
- Look at a learner’s Math Quiz progress and suggest what to practice next.
It shows each change first and waits for your OK.
Sign in with a guardian or individual account to use it.
Ideas & explanations
Explore David Deutsch
Ask questions across David Deutsch’s interviews, follow the quoted sources, and read the conversations in full.
More ways to explore
Practice & discovery
Assess and build math fluency
Practice arithmetic, find the next challenge, and see progress over time. MathFlu brings quizzes, assessment, and guardian tools together.
Prototype applets
Community & public health
Civic & emergency response
Explore local preparedness and public-health archives, with questions and answers grounded in the original meetings and documents.