Commit to a reasoning move.
Practice asks for the step, classification, order, proof move, or decision that shows what you actually understand.
Public demo, no sign-in
Find the exact idea you missed.
Gradus turns rigorous STEM practice into a reasoning loop: attempt, diagnose the breakdown, repair the prerequisite, and prove the idea transfers.
No account, no email, no waitlist wall. Demo progress stays in this browser.
6public preview paths
0runtime LLM grading decisions
1next repair target after a miss
The useful moment starts after you get stuck.
Most tools explain more. Gradus makes the failed reasoning move visible, then sends you to the smallest prerequisite worth repairing.
See the failure mode, not just a red mark.
A miss maps to a concept, fail point, and dependency so the next action is concrete.
Fix the prerequisite and test transfer.
The loop does not stop at a hint. It asks whether the repaired idea works in a different-looking case.
A loop built for independent reasoning.
The canonical Gradus loop is Predict, Attempt, Explain, Diagnose, Repair, Transfer, Reflect. The homepage sells the short version because the demo lets learners feel it quickly.
Predict
State what should happen.
Confidence and expectation become evidence, not decoration.
Attempt
Make the move.
The item captures a reasoning choice tied to a concept graph.
Diagnose
Name what broke.
Gradus identifies the fail point and the prerequisite behind it.
Transfer
Prove it elsewhere.
A repaired idea has to survive a new representation or context.
Read with a target.
Focused lessons lead into the exact concepts that practice will test.
Review progress by concept.
Diagnostics show what is improving, what still needs repair, and where the next useful action sits.
See the course structure.
Courses are navigable by chapter, concept, prerequisite, and repair need.
Start with a serious course, not a toy prompt.
Public previews are curated slices. The full catalog spans math, computing, science, engineering, analytics, and systems courses for ambitious learners.
Preview
Business Analytics and Decision Skills
Tradeoffs, uncertainty, expected value, constraints, and decision quality.
Preview
Algorithms and Data Structures
Invariants, correctness, graph methods, asymptotic reasoning, and data structures.
Preview
Programming Concepts and Abstractions
State, semantics, abstraction, interfaces, concurrency, and reliability.
Preview
Linear Algebra and Matrix Methods
Subspaces, rank, orthogonality, eigenvalues, SVD, and data geometry.
Preview
Databases and Data Systems
Relational models, SQL, indexes, transactions, recovery, and query plans.
Preview
Computer Networks
Protocols, transport, routing, performance, wireless, and network security.
Built for serious course use.
Gradus is not trying to replace teachers, textbooks, office hours, or student thinking. It adds a structured diagnosis and repair layer that stays inspectable.
Inspectable practice
No runtime chat grading.
Each practice item is tied to a concept, a known failure pattern, and a useful repair path. The feedback stays predictable when learners are working through difficult material.
Every item knows the concept it tests.
A miss points to a specific prerequisite.
Repair ends with a transfer check.
Public demo
No account before the first loop.
The demo is local-only and no-information: no sign-in, no email, no waitlist wall, no course builder, and no cloud progress sync.
Teacher signal
Evidence can become class action.
When used in pilots, diagnosis can describe class-level misconception patterns and the next intervention a teacher can make.
Closed beta
Full access stays gated.
Authenticated releases remain learner-only and controlled while course quality, entitlement, teacher, and organization workflows mature.
Try one miss, one diagnosis, one repair.
The demo is short by design. It should prove the product loop before asking you for anything.
Waitlist
Tell us which course should open next.
The beta is closed while courses are tested. Try Gradus first, then join the list if you want access to the full system.
Join the student beta
Requested tracks help prioritize beta invites and course readiness work.