This bundle is a set of classroom-ready HTML apps that turn abstract development models into vivid, hands-on learning. Students and teachers can tweak real parameters, see instant visual feedback, and link model mechanics to policies and outcomes, making “why it happens” as clear as “what happens.”

Lorenz–Gini Interactive Visualiser

A slick, decile-by-decile income editor with ready-made country presets, a live Lorenz curve, auto-calculated Gini, and a poverty-line headcount calculator lets learners connect distribution shapes to inequality metrics and poverty in seconds; it’s ideal for demonstrations, inquiry tasks, or assessment where students must justify which policy best shifts shares for the bottom deciles. Learners come away able to interpret Lorenz geometry, compute and compare inequality, test “what-if” redistributions, and explain the difference between inequality and poverty using their own parameter choices.

Modern Inequality Models Explorer (Kuznets Explorer)

This app puts competing theories side-by-side—from classic Kuznets and N-shaped patterns to Piketty’s r>g, tech-bias, globalization, and institutional quality—so students can vary GDP per capita, slide key parameters, overlay country paths, and trigger policy shocks to see why inequality rises, falls, or re-emerges. Learners finish with a comparative understanding of mechanisms behind inequality, can diagnose which theory fits a country’s trajectory, and can argue policy trade-offs with model-based evidence.

HDI Builder

A clean interface for the Human Development Index lets users set life expectancy, mean and expected schooling, and GNI per capita, while the tool computes each sub-index, the geometric mean, category bands, and surfaces tailored improvement suggestions and country comparisons. Students build fluency with HDI methodology, practice decomposition and sensitivity analysis, and justify priority reforms by showing how marginal changes in health, education, or income shift the overall index.

Harrod–Domar Growth Model Simulator

With sliders for savings, ICOR, depreciation, population growth, presets for “rapid,” “balanced,” and “poverty trap,” plus shock buttons for war, aid, technology, and crisis, this simulator animates the famous knife-edge instability and contrasts warranted, actual, and natural growth paths. Learners internalize the growth equation, detect instability conditions, and evaluate how policy or shocks move an economy toward or away from equilibrium, turning dense theory into memorable trajectories.

Dutch Disease Simulator

An intuitive dashboard lets you dial a resource boom, spending and movement effects, labour mobility, trade elasticity, export intensities, and a stabilization fund, then watch sectoral shares, the real exchange rate, export competitiveness, and fund size respond in real time. Students leave able to explain spending- and resource-movement channels, predict exchange-rate and tradables impacts, and defend the case for sovereign wealth funds with model-based reasoning