Strata Mundo
Strata Mundo — your math mastery voyage Most math tools tell you a percentage.
Core trick
Feeds drag-and-drop interaction logs to a model that outputs categorical mastery labels per standard, never numeric scores.
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Description
Strata Mundo — your math mastery voyage
Most math tools tell you a percentage. Strata Mundo tells you how a learner reasons.
A learner builds fractions by dragging brass pieces onto a target — every drag, removal, and reset is recorded as process telemetry. Claude Opus 4.7 reads the full trajectory and produces a categorical mastery map per CCSS standard: mastered, building the skill, misconception detected (with the specific named wrong mental model and traceable evidence), or not yet probed. Never percentages. A Plan Architect Managed Agent then synthesizes a tailored plan: 2–3 activities per gap, drawn from a curated multimodal library, sequenced concrete → representational → abstract.
The library grows from contributions. Anyone — guides, parents, teachers, learners themselves — can submit a new activity. Every submission is reviewed by Opus 4.7 against six published pedagogical criteria, then by a human. Criteria are public on the methodology page.
Built solo in 4 days for the Cerebral Valley Built with Opus 4.7 hackathon. Live at stratamundo.com. Everything user-facing — home, methodology, contribute, search, voyage, report — uses Opus 4.7 as the substantive reasoning engine. Categorical, never numeric. Misconception-named, never vague. Community-grown, AI-vetted, human-approved.
README excerpt
# Strata Mundo *Your math mastery voyage.* A diagnostic, a plan, and a probe loop — together, the voyage through math mastery. v1 covers grade 3–4 fractions; designed to extend to all of K-8 math (and beyond) without changing the engine. Built solo in 4 days for the Cerebral Valley **Built with Opus 4.7** hackathon. 🌐 **Live:** [stratamundo.com](https://stratamundo.com) --- ## The three questions Strata Mundo answers Every guide and parent serious about mastery wants three things answered: 1. **Where is the learner in their math journey, really?** Not what they perform under pressure — what they understand. 2. **What should they work on next, exactly?** Not a percentage that needs to rise — concrete activities for a specific gap. 3. **What different effective tools are out there to truly master that skill?** Not the same boxed practice repeated — varied, real-world, hands-on options across modalities. Existing math tools answer none of these well. Khan's course challenge probes a year with 30 questions and grades right/wrong. IXL grades a kid on speed. Beast Academy engages but doesn't diagnose. Most tools treat a wrong answer as a number to lower, not as evidence of a specific misconception to address. ## What this does A learner takes a ~10 minute drag-and-build fractions assessment. The system records every interaction as **process telemetry** (placements, removals, commits, resets, timing) and uses Claude Opus 4.7 to read the *trajectory* — not just the final an