In this section of the site, learners get a chance to engage directly with scientific and mathematical concepts through hands-on, playful, and visual tools. Instead of passively reading about theory, users can experiment, explore, and visualize ideas in real time.
Use this lens and ray optics simulator to see how convex and concave lenses form images. Change object distance, focal length, object height, and lens power to connect ray diagrams with cameras, glasses, and magnifying lenses. How to use the lens and ray optics simulator The tool shows the main rays used in school ray … Read more
Use this decimal to binary converter to convert base 10 numbers into binary and see the step-by-step division method. You can also convert between binary, decimal, octal, hexadecimal, and other bases. How to use the decimal to binary converter 1 Enter a decimal number Type a whole base 10 number, such as 42, 64, 100, … Read more
Use this Doppler Effect of Sound Simulator to see why an ambulance siren sounds higher as it approaches and lower after it passes an observer. How to use the Doppler effect simulator 1 Move the ambulance Use the position slider or press Start Motion to let the ambulance pass the observer. 2 Change the speed … Read more
Use this interactive vector explorer to learn vectors in 1D, 2D, and 3D. Change vector components, insert a second vector, and watch graphs, formulas, magnitudes, directions, and step-by-step solutions update instantly. How to use the interactive vector explorer 1 Choose 1D, 2D, or 3D Start in 2D for the clearest graph, then try 1D and … Read more
Use this Hooke’s Law spring motion simulator to pull or compress a spring and watch the restoring force, acceleration, period, and energy change in real time. How to use the Hooke’s Law simulator 1 Pull or compress the spring Move the displacement slider left or right. The spring force points back toward the resting position. … Read more
Use this Momentum Conservation and Collision simulator to change the mass and velocity of two balls, choose elastic or inelastic collision, and see why total momentum stays the same in an isolated system. How to use the Momentum Conservation and Collision simulator 1 Set the two balls Use the sliders to choose mass and signed … Read more
Use this interactive logic gates simulator to test binary inputs, compare outputs, and see the matching boolean expression and truth table for each gate. How to use the logic gates simulator 1 Choose a gate Select AND, OR, NOT, NAND, NOR, XOR, or XNOR. The circuit rule changes instantly. 2 Switch inputs Turn input A … Read more
Use this electromagnetic spectrum explorer to slide from radio waves to gamma rays. Watch wavelength, frequency, photon energy, examples, uses, and safety ideas update in real time. How to use the electromagnetic spectrum explorer 1 Drag across the spectrum Move the slider from radio waves to gamma rays. The selected wave type changes on the … Read more
Use this moon phases learning tool to see why the Moon appears to change shape during a lunar month. Drag the Moon around Earth and compare New Moon, waxing crescent, First Quarter, waxing gibbous, Full Moon, waning gibbous, Last Quarter, and waning crescent. How to use the moon phases learning tool 1 Drag the Moon … Read more
Use this potential and kinetic energy simulator to move a ball down a smooth slope. Watch height, speed, potential energy, kinetic energy, and total energy change together. How to use the potential and kinetic energy simulator 1 Move the ball Use the position slider to move the ball from the top of the slope to … Read more