Interactive learning
made simple.
Concepts you can see. Labs you can try. Practice that makes you better.
- CBSE curriculum-aligned
- Interactive, not video
- Practice with instant marking
- Free & ad-free
Explore by class
Start where you are — Class 8, 9, 10, 11 & 12 are fully live, the rest are rolling out.
Top subjects
Interactive Maths & Science are live for Class 8, 9, 10, 11 & 12. More subjects on the way.
Featured interactive labs
The fastest way in — ideas you can actually play with, right in the browser.
Circuit builder
Build a circuit and watch Ohm's law happen — total resistance, and the current and voltage on every resistor.
Open labMirror ray diagrams
Move the object in front of a concave or convex mirror and watch the image form — real or virtual — with the mirror formula.
Open labLens ray diagrams
Drag the object and watch the rays and image form in real time — real/virtual, magnification, the lot.
Open labpH scale
Slide the pH or pick an everyday substance and watch the universal-indicator colour and what litmus & phenolphthalein show.
Open labGraph plotter
Plot a line or a parabola and watch its zeroes, discriminant, vertex and y-intercept change as you move the coefficients.
Open labUnit circle
Drag the angle around the circle and see sin, cos and tan appear — with the exact values at the special angles.
Open labProjectile motion
Launch a ball at any speed and angle and watch the parabola — live time of flight, max height and range.
Open labCharged particle in fields
Curve a proton or electron into a perfect circle in a magnetic field, or find the one speed that slips through a velocity selector undeflected.
Open labDouble-slit interference
Drag the wavelength, slit separation and screen distance and watch the interference fringe pattern redraw live.
Open labPhotoelectric effect
Pick a metal, tune the light's frequency, and watch — below the threshold frequency, nothing comes out no matter how bright.
Open labSHM simulator
Switch between a mass-spring system and a simple pendulum — live period, top speed, and the kinetic/potential energy trade-off.
Open labCapacitor explorer
Change the plate area, separation, dielectric and voltage and watch capacitance, charge, field strength and stored energy update instantly.
Open labEMI simulator
Change how fast the field is changing and watch the induced EMF and current respond, with direction always fixed by Lenz’s law.
Open labAC LCR simulator
Sweep the driving frequency and watch the phasor diagram turn and the resonance curve peak the moment XL = XC.
Open labPeriodic trends
Pick a period or group, pick a property, and click an element to read its exact atomic radius, ionization enthalpy or electronegativity — exceptions included.
Open labTitration curve
Add NaOH to HCl drop by drop and watch the pH curve trace itself out — including the sharp jump through neutral at the equivalence point.
Open labGalvanic cell
Change the zinc and copper ion concentrations and watch the Nernst equation predict exactly how the cell voltage shifts.
Open labReaction kinetics
Switch between zero, first and second order reactions and watch the decay curve, half-life and live concentration update by the correct rate law.
Open labDerivative visualizer
Slide a point along a curve and watch the tangent line follow — with the derivative computed live as the tangent’s slope.
Open labIntegral visualizer
Watch a Riemann sum of thin rectangles converge to the exact area under a curve as you add more of them.
Open labConic sections
Drag the parameters of a circle, parabola, ellipse or hyperbola and watch its shape, foci and eccentricity update instantly.
Open labProbability tree
Build a two-stage probability tree and watch Bayes' theorem work backwards to find which branch an outcome most likely came from.
Open labLinear programming
Tilt the objective function and watch which corner of the feasible region becomes optimal — the corner-point method made visual.
Open lab3D vector visualizer
Drag two vectors in 3D space and watch their dot product, cross product and the angle between them update live.
Open labVSEPR explorer
Pick a molecule and see exactly why lone pairs bend its shape, rendered in 3D.
Open lab