Auto-scored math items, authored in natural language
LidNote allows assessment and courseware platforms to generate interactive math items from simple descriptions. Figures are fully interactive, and every interaction is automatically scored against the constraints of the described item.
Example: “Construct a dodecahedron with its displaced icosahedron dual. Success: the icosahedron repositioned as the dodecahedron seed.”
Interactive items are expensive to build
Technology-enhanced items — drag a point, complete a geometric construction, manipulate a figure — test understanding in ways multiple-choice items cannot. For complex interactive items, much of this work is still done by hand.
Built by developers
Catalogs take weeks to hand-build and custom logic must be maintained indefinitely.
Or bought as labor
Content-service firms build on your behalf, with every item charged in billable hours.
AI authoring stops at code-gen
Math items require more than code generation to achieve live feedback and auto-scoring.
From author description to scored interactive item
“Construct a dodecahedron with its displaced icosahedron dual. Success: the icosahedron repositioned as the dodecahedron seed.”
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Figures can be authored from natural language
A structured operation set ensures that items are predictable and editable. No free-form code generation.
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Solution checks are automatic
Student actions can be evaluated continuously by our solver, making feedback both adaptive and immediate.
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Embeds directly into your product
Your house style, your platform, your item bank, your control — delivered as an API, or an embeddable SDK.
How it works
Describe the item
The author describes the construction and what counts as a correct answer.
Build the figure
LidNote turns that description into an interactive scene.
Let the student interact
Students drag, rotate and manipulate the figure in 2D, 3D, or both.
Check the mathematics
The solver evaluates the interaction against the item's constraints.
A specialist component for your assessment stack
Assessment and courseware platforms license specialized math components like calculators, equation input and subject-specific interactives. LidNote provides the equivalent solution for complex interactive math items.
- We handle the complexity
- Building in-house means handling a specialized geometry engine, authoring, scoring and compliance infrastructure, indefinitely. We handle this so that assessment platforms can focus on their authors and learners.
- Keep your platform focused
- Platforms compete on delivery, psychometrics and integrations. The geometry engine is our core business; it improves every quarter without your roadmap having to pay for it.
- Maintained for you
- Designed for keyboard navigation and screen-reader accessibility, with ongoing attention to conformance, device compatibility and interop.
- Neutral by design
- LidNote is not an assessment platform. We provide technology for this item category and let our customers own the learner and author experience.
Open to design partners
We are working with a small number of assessment and courseware platforms to validate how interactive mathematics should fit into existing authoring and delivery workflows. Design partners will help shape the item types, authoring workflow and integration surface while gaining early access to the technology.
Platform access is currently reserved for pilot licensees. If you're an investor, an assessment platform, or a publisher with an interactive catalog — we'd like to talk.