StemVault · interactive teaching
Curated applets, notes, and resources across Mathematics, Chemistry, Physics, and Biology - built for Years 7 to 12.
Applets, files, videos, and quizzes - filter by type, subject, year level, and tags.
Interactive 3D visualization of a charged particle moving through a uniform magnetic field. Explore the Lorentz force (F = q v × B), circular motion, and the effect of changing charge sign, field strength, and particle speed. Vectors show velocity and force in real-time.
PhET interactive simulation of the photoelectric effect. Explore how light behaves as quanta by shining different wavelengths and intensities on metal surfaces. Observe photon energy, stopping potential, and electron kinetic energy in real-time. Universal learning tool with adjustable parameters and live data.
Interactive quiz covering the core index rules: multiplying powers (add exponents), dividing powers (subtract exponents), power of a power (multiply exponents), zero indices, and negative indices as fractions. 24 randomized questions with immediate feedback. No answers revealed on incorrect choices — encourages reflection.
Interactive visualization of the photoelectric effect demonstrating that light behaves as quanta (photons). Adjust frequency and intensity to explore why bright red light fails while dim violet succeeds. See real-time photon emission, velocity vectors, and two key graphs: maximum kinetic energy vs frequency (slope = h) and photocurrent vs intensity.
Comprehensive 19-question quiz covering core Year 8 statistics: nominal, ordinal, discrete and continuous data types; distribution shape (symmetrical, skewed, bimodal); sampling methods (simple random, systematic, stratified); measures of location (mean, median, mode); quartiles and interquartile range; stratified sampling calculations; and interactive column graph building. Progressive difficulty with immediate marking and full review.
Interactive simulation of Young's double slit experiment. Adjust path difference at the screen to see constructive and destructive interference patterns. Includes wavefront animation, intensity distribution, and detailed path difference visualization.
Video explanation of how observation affects Young's double slit experiment outcomes, exploring the quantum mechanics concept of wave-particle duality and the measurement problem.
Veritasium's demonstration of Young's double slit experiment using water waves, showing how interference patterns form with two coherent sources.
Interactive visualization showing how any closed curve can be drawn as a sum of rotating circles (epicycles). Watch the Fourier series construct shapes from its harmonic components, with adjustable precision and playback speed.
Interactive GeoGebra applet exploring the point-slope form of the equation of a line: y = m(x-x₁) + y₁.
An interactive animation of four membrane transport mechanisms: simple diffusion, facilitated diffusion, active transport, and osmosis. Live molecule counts show the concentration gradient, and a timeline scrubber compares the start and end states.
Interactive animations of the three modes of heat transfer: conduction (energy passed between vibrating particles), convection (buoyancy-driven fluid currents), and radiation (light waves crossing empty space). Includes play/scrub controls and speed adjustment.
Interactive simulation exploring the relationship between internal energy and temperature as matter changes state. Visualize particle motion and the effect of latent heat at melting and boiling points.
Amplify Classroom (Desmos) activity where students sketch antiderivative graphs, for Year 11 Mathematical Methods.
Amplify Classroom (Desmos) activity comparing average and instantaneous rates of change, for Year 11 Mathematical Methods.
Amplify Classroom (Desmos) activity exploring the Fundamental Theorem of Calculus, for Year 11 Mathematical Methods.
Amplify Classroom (Desmos) activity exploring radian measure as an alternative to degrees, for Year 11 Mathematical Methods.
Amplify Classroom (Desmos) activity on solving trigonometric equations, for Year 11 Mathematical Methods.
Amplify Classroom (Desmos) activity where students sketch derivative graphs, for Year 11 Mathematical Methods.
Interactive GeoGebra applet for practicing derivative calculations in a game-like setting, for Year 11 Mathematical Methods.
Amplify Classroom (Desmos) activity exploring instantaneous rate of change by surfing the gradient of a curve, for Year 11 Mathematical Methods.
Amplify Classroom (Desmos) activity exploring the symmetry properties and even/odd characteristics of sine and cosine functions, for Year 11 Mathematical Methods.
Amplify Classroom (Desmos) activity exploring the cosine function, its graph, and key properties, for Year 11 Mathematical Methods.
Amplify Classroom (Desmos) activity introducing the derivative via the tiny tangent approach, for Year 11 Mathematical Methods.
Amplify Classroom (Desmos) activity exploring the unit circle and its role in trigonometry, for Year 11 Mathematical Methods.
Amplify Classroom (Desmos) activity exploring the tangent function, its graph, and key properties, for Year 11 Mathematical Methods.
Amplify Classroom (Desmos) activity introducing the derivative, for Year 11 Mathematical Methods.
Amplify Classroom (Desmos) activity exploring the sine function, its graph, and key properties, for Year 11 Mathematical Methods.
Interactive GeoGebra applet exploring the unit circle from an axis perspective, showing how trigonometric values relate to coordinates, for Year 11 Mathematical Methods.
Interactive GeoGebra applet exploring why the constant e is important in mathematics and exponential growth, for Year 11 Mathematical Methods.
Interactive Desmos applet exploring the superposition of waves and how they add to produce constructive and destructive interference, for Year 12 Physics.
Amplify Classroom (Desmos) activity where students sketch position-time graphs using a turtle sketch interface, for Year 11 Physics and Mathematical Methods.
Amplify Classroom (Desmos) activity exploring how the area under a rate graph relates to distance or displacement, for Year 11 Physics.
PhET simulation exploring how accelerating charges generate electromagnetic waves, for Year 12 Physics.
Interactive Desmos applet exploring how generators produce an EMF, for Year 12 Physics.
Interactive Desmos applet exploring optical resolution and the Rayleigh criterion through diffraction, for Year 12 Physics.
Interactive Desmos applet exploring standing waves, harmonics, and resonance for Year 12 Physics.
Interactive simulation of single-slit diffraction and Young's double-slit interference. Vary wavelength, slit separation, and screen distance and watch the wavefronts propagate and build the intensity pattern in real time.
Interactive practice quiz for rounding numbers to 0–3 decimal places. Three difficulty levels with built-in score tracking across easy, medium, and hard modes.
Interactive applet exploring supplementary and complementary angles with mode switching and built-in quiz practice, for Year 8 Mathematics.
Interactive practice quiz exploring angle relationships when parallel lines are crossed by a transversal. Students identify angles using properties like vertically opposite, corresponding, alternate, and co-interior angles.
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