Working prototype. Algebra and quadratics.
Lesson playerFactoring x² + bx + c. Nine steps, graded server-side. The graph question works by mouse or keyboard. Student viewThree items exactly as a student sees them — no standards, no prerequisites, and no answer key in the page. Try getting one wrong. Lesson libraryFourteen lessons on quadratics, each tagged with a Common Core standard and its prerequisites. Item renderer (diagnostic)The developer view of the same items, showing the metadata a student never sees.