Every Drill Session Is a
Mini Mystery Arc.

The Curiosity Card is a short puzzling question you read before the drill starts. It matters because of a specific cognitive fact: when your brain encounters an unresolved question, it opens a retrieval loop that measurably increases how much of the following experience gets stored in memory. This is Willingham's mystery gap — dopamine gates memory consolidation, and unresolved curiosity keeps that gate open. A drill session with a curiosity hook and a reveal at the end is not just "the same drill with garnish." It is a completely different cognitive event. This design comes straight from DR-152 (The Inquiry Sandwich) — the strong form of the recommendation was to build this in from the ground up, not bolt it on.

Ten problems is a compromise between two constraints. Fewer than seven and there aren't enough repetitions for the target skill to actually stabilize in working memory. More than fifteen and fatigue starts to erode accuracy and undo the practice benefit. Ten is the sweet spot for a 2-to-3-minute mini-arc — long enough to build competence, short enough to complete before your attention drifts, and short enough that you'll cheerfully play a second session immediately. This is not folk wisdom; it's cognitive load theory (Sweller) applied to the specific structure of procedural math drill.

Correct. The Learning Arcade at Global Sovereign University does not issue certificates. GSU's honest position is that a certificate you couldn't produce yesterday is worth exactly as much as the knowledge behind it and no more. If you drill until you get 10/10 five times in a row on fractions, you own that skill regardless of whether anyone hands you a piece of paper. If you don't drill and someone hands you a paper anyway, the paper is a lie. The tier badges you see (Bronze, Silver, Gold, Platinum) are session-scored — they reset every drill so you can watch your own progress, not so you can collect them. If you want a formal, publicly-verifiable credential, GSU offers eight free Certifications at globalsovereignuniversity.org/certification — those are proctored exams, not drill games.

Neither. When you get a problem wrong here, the feedback tells you the correct answer and shows the calculation. Read it before moving on. The single strongest predictor of whether drilled knowledge sticks is not raw repetition — it's corrective feedback delivered within seconds of the mistake. That is the design of this page. You'll notice the "Next" button doesn't appear until after you've seen the feedback, which is not an accident.

Your session count, personal best, and current best streak per subject are saved in your browser's localStorage — meaning they never leave your device. GSU does not have an account for you. GSU does not have a database entry with your name in it. If you clear your browser data or use a different device, your progress starts over. This is intentional: the game is designed for the person who arrives at 3 a.m. with no account, no email, no explanation, and just wants to learn. Nothing about that person needs to be tracked to be served.

Yes — that is exactly what GENO is here for. Click the GENO widget in the lower right, and ask something like "On the pre-algebra generator, why does 3 + 2 × 4 = 11 and not 20?" GENO tutors in 83 languages, has memorized every free PDF book GSU publishes, and can walk you through the reasoning without judgment and without hurry. If GENO can't answer a specific question, that's a signal we need to publish more free curriculum — please tell us via the Contact link so we can fix it.

Yes to all three, with a caveat. The Place Value and Whole Number Operations generators start easy enough for a strong 3rd-4th grader. Algebra 1 is calibrated for early high school or a returning adult. Everything in between spans grades 5-9. For a math-anxious learner: the Curiosity Cards are the point of this build. Every session starts with something interesting — not "here is a test." That reframing is precisely what the research says helps with math anxiety, and it's why this page exists.

The fractions generator accepts either format. You can type 3/4 or 0.75 and both are counted as correct. For mixed numbers you can type 1 1/2 (with a space) or 1.5. If you write 6/8 instead of 3/4, it will still be marked correct because they're the same number — the game does the reduction for you. This is not sloppiness; it's an honest reflection of the fact that a fraction is a value, and the game tests whether you know the value, not whether you know how to type it.