Free interactive labs · AI lesson videos
One board per concept, with a guided walk-through, a short explanation and a quick check. Once it clicks, turn it into a narrated lesson video.
01 / 04·Secant to tangent
Derivative as the slope of a tangent
Why is the derivative the slope of the tangent line?
Lab index
Each suite is a run of chapters that goes from intuition to the formal idea, one concept per chapter.
8 chapters
Drag the parameters of a graph and watch it move: a parabola shifted and stretched, exponentials mirrored into logarithms, sine unrolled from the unit circle and reshaped by A, ω and φ, tangents that reveal where a function rises and turns, a zero trapped by halving, and rectangles adding up to an integral.
4 chapters
Each conic from its own definition: a string of fixed length round two pins, equal distances to a focus and a line, a fixed difference of distances. Then one eccentricity ties the three into a single family.
Start the lab4 chapters
Proofs you can take apart by hand: move the pieces and see why the theorem has to hold.
4 chapters
Chance built up from counting: choose and arrange, add up the paths of repeated trials, read probability as area under the bell curve, and watch a frequency settle as the trials pile up.
4 chapters
Straight-line motion on a v–t graph, projectiles, circles and relative velocity: set things moving and read the numbers off the board.
Start the lab4 chapters
Resolve forces on a slope, time a spring and a pendulum, and follow energy as it changes form: every force and every joule drawn on the board.
Start the lab3 chapters
Watch a wave travel while the medium stays put, two waves add into an interference pattern, and a moving source squeeze its own sound.
Start the labFrom lab to video
A lab's guided steps are a ready-made storyboard: each one has board settings and a line to say. "Turn it into a video" takes the lab's key points into the creator, which plans a narrated video; you check the formulas, storyboard and Manim code before it renders.
Guided steps · Transformations
The parent graphShot 1
With , , the curve is : vertex at the origin, opening up, one root at .
a stretches and flipsShot 2
At every height doubles, so the parabola looks narrower. At heights are halved and flipped: it opens downward.
h slides sideways, against its signShot 3
Set : the formula reads and the vertex moves to , to the right. The bracket is zero when , which is where the vertex now sits.
k lifts, and roots appearShot 4
Now drops the vertex to and the curve crosses the -axis twice, at . Raise above and the roots disappear.
For teachers
No install, no sign-in: open the link and put it on the projector. Afterwards, turn the same lab into a video students can rewatch.
Full screen in one click, on a paper or dark board that reads from the back row.
Switch on the pen and circle or annotate right on the board while you explain.
Each chapter ends with a few multiple-choice questions and instant explanations.
Turn a lab into a narrated video for your slides or the class chat.
Pricing
Labs
Free
Every lab, guided walk-through and quiz. No sign-in.
Starter
$9.90/mo
300 credits a month for occasional videos.
Pro
$18.90/mo
1000 credits a month, at a lower price per video.
FAQ
How the labs work, how videos are made, and what each plan includes.
Every lab is free and works without an account. You only sign in, and spend credits, when you turn a lab or an idea into a video.
"Turn it into a video" opens the creator with the lab's key points as the starting brief. CurvG plans the storyboard and Manim code from it, and you can edit both before rendering to MP4.
CurvG is an AI math animation maker built on Manim Community, the open-source Python engine behind 3Blue1Brown-style math animation. It turns a written explanation goal into a scene plan and Manim code, with a review step before rendering.
CurvG does not stop at a prompt and a final video. It shows the proposed explanation, mathematical assumptions, scene order, and generated Manim code, so you can catch a problem before rendering. AI output is still not guaranteed to be correct.
No. A model can misread notation, make a false assumption, or generate incorrect scene logic. CurvG makes those decisions easier to inspect, but it does not replace mathematical review.
No — rendering runs in the cloud, so you can plan, generate, and render without installing anything. You only need a local Manim environment if you want to run the exported code on your own computer.
Not yet. The current Creator lets you view, copy, and download generated Python, but it does not provide direct code editing or compilation in the browser.
Yes. Cloud rendering is built in: approve the scene, render it to an MP4, and download the result. Paid plans include render credits, and failed or canceled renders are refunded automatically.
Yes. Every interactive lab and math wonder is free. For videos, every verified account gets 3 free previews (720p, watermarked) and Manim code export is free. Clean 1080p videos are priced by the number of videos.
