An undergraduate introduction to special relativity, covering Einstein’s postulates, reference frames, Lorentz transformations, simultaneity, time dilation, length contraction, and velocity addition.

Learn how forces affect motion through Newton’s three laws. Explore inertia, acceleration, action–reaction pairs, free-body diagrams, gravity, friction, and practical problem-solving.

Explore how the Sun, Earth, and Moon line up to create eclipses. Learn about shadows, solar and lunar eclipse types, why eclipses are uncommon, and how to observe them safely.

An undergraduate introduction to probability theory covering sample spaces, events, counting, conditional probability, random variables, distributions, expectation, variance, and common probability laws.

A high school introduction to trigonometry covering angle measures, right-triangle ratios, the unit circle, common values, function graphs, identities, and practical problems involving heights and distances.

Students explore fractions, decimals, and percentages; compare and calculate with each form; convert among them; and solve everyday problems involving prices, parts of a whole, and discounts.

An undergraduate introduction to neural networks, covering artificial neurons, weights, activation functions, layers, training with backpropagation, and the advantages of deep models for complex tasks.

An accessible introduction to machine learning for high school students. Learn how supervised, unsupervised, and reinforcement learning use data, labels, patterns, actions, and rewards in daily-life examples.

Explore what artificial intelligence means, where students encounter it, and how it differs from ordinary rule-based computer programs. Learn AI's strengths, limits, and responsible use.

Explore how ancient and early modern travelers crossed oceans using landmarks, winds, stars, maps, compasses, and instruments. Compare Polynesian, Viking, Asian, and European navigation traditions.

An undergraduate introduction to how economies produce goods, allocate scarce resources, trade through markets, and use money and banking to coordinate exchange and influence prices.

This presentation explores how Roman wars built and strained an empire, how engineering transformed daily life, and how law, citizenship, religion, and class reshaped Roman society.

Explore Earth’s countries, continents, landmasses, landforms, and five oceans. Learn to read world maps and discover how borders, capitals, land, and water shape our planet.

An undergraduate introduction to air pollution, covering pollutant sources and chemistry, atmospheric transport, health and environmental impacts, measurement methods, regulation, and mitigation technologies.

An accessible introduction to long-term shifts in Earth’s temperature and weather. Students examine causes, evidence, impacts on people and nature, and practical mitigation and adaptation solutions.

Students explore how organisms and nonliving surroundings form ecosystems. They learn roles in food webs, relationships, adaptations, and practical ways people can protect ecosystems.