Interactive simulations for IB DP Biology, Chemistry, IGCSE Science and MYP Science. Built for teachers who explain concepts themselves β and want students to see them.
Osmosis, turgor, plasmolysis and Οw = Οs + Οp. Six cell types with accurate internal concentrations. Animated particle ratios. Equilibrium crossing counter.
Replication fork animation. Helicase, leading strand, lagging strand, Okazaki fragments. Semi-conservative replication with pause-and-question checkpoints.
Interactive chromosome movements. Crossing over slider. Non-disjunction toggle. Shows Down syndrome as a consequence of meiotic error.
Fluid mosaic model. Simple diffusion, facilitated diffusion, active transport with ATP cost. Adjustable concentration gradients. Bridges into nephron and neurons.
Watch allele frequencies shift over generations. Toggle directional, disruptive and stabilising selection. Run 10 simultaneous simulations to show genetic drift. H-W calculator with worked solutions.
Anatomically realistic nephron with loop of Henle, vasa recta, ADH and aquaporins. 7-stage guided progression with checkpoints. Scenario presets for dehydration, overhydration and diabetes insipidus. Live medullary gradient.
Animated cardiac cycle with live Wiggers diagram, SA/AV node conduction, valve states and 6-stage progression. Blood vessel cross-sections, tissue fluid formation, double circulation, CHD and IB Exam Mode with teacher/student toggle.
Live graph of blood glucose during and after exercise. Adjustable intensity (low / medium / high), real-time and fast-forward modes, hormone indicators for adrenaline and insulin. Auto-captures rest, peak and 10-minute recovery values into a printable results table.
Working potometer with realistic bubble physics. Adjustable light, temperature, humidity, wind and leaf area across mesophyte, xerophyte and hydrophyte. Interactive leaf cross-section, stomata mechanism with KβΊ flux, side-by-side adaptations and a microscope view for stomatal density counting. One-click export of trial data to the Statistics Tool.
Two-mode particle simulation. Diffusion mode with adjustable temperature and particle mass (Brownian motion, live spread-radius graph). Pressure mode with temperature vs pressure and volume vs pressure sub-investigations, real-time pressure gauge, bouncing-particle physics. Core/Standard/Challenge difficulty toggle. Prediction-before-start gating, IV/DV/CV identification, and a particle-explanation builder. Strictly qualitative, no PV=nRT.
Substrate concentration, pH, temperature, competitive and non-competitive inhibition. Michaelis-Menten curves. Multi-trial data with CSV export. IA-ready.
Resting potential, depolarisation, repolarisation. Ion channel states. Propagation along unmyelinated and myelinated axons. Saltatory conduction.
Collision theory visualised. Temperature, concentration and surface area effects on reaction rate. Maxwell-Boltzmann distribution. Activation energy and catalysis.
Spring extension vs. force. Elastic limit. Multiple spring configurations. Generates lab data with scatter and best-fit line. Built for IGCSE practical assessment.
These simulations are designed for IB DP Biology, IB DP Chemistry, IGCSE Science and MYP Science. Each one is built around a specific syllabus section, aligned to command terms and assessment objectives.
The philosophy: the teacher explains the concepts. The simulation shows what can't be drawn on a board β particle behaviour, dynamic equilibrium, concentration gradients, real-time response.
All simulations are free, require no account, and work in any browser. No tracking. No ads.