Piaget’s stages of development include sensorimotor, preoperational, concrete operational, and formal operational. While there is some criticism of them, they may help characterize child development.

Avinash Dixit, John J. F. Sherrerd '52 University Professor of Economics at Princeton University, is John Nash's colleague and friend. He has taught economics courses on games of strategy, and written ...

Education Week is the #1 source of high-quality news and insights on K-12 education. Sign up for our EdWeek Update newsletter to get stories like this delivered to your inbox daily. Is “critical race ...

When asked the question, "What is a theory?" most of my students (regardless of age or educational level) respond with an explanation that is akin to "a reasonable, educated/informed guess." Indeed, ...

Theory of mind is typically defined as the ability to understand the thoughts, beliefs, desires, and emotions of other people. This understanding allows individuals to predict how others will feel, ...

When the theory of relativity appeared in the early 1900s, it upended centuries of science and gave physicists a new understanding of space and time. Isaac Newton saw space and time as fixed, but in ...

Thanks to science fiction, we all have a basic grip on the theory of the multiverse: the idea that there are innumerable parallel worlds in which the chances and choices of the past – the roads not ...

Most people think about pain as a simple cause-and-effect process. For example, if you touch a hot stove, you probably assume that the nerves in the skin feel how hot the stove is and signals are sent ...

The mother of all string theories passes a litmus test that, so far, no other candidate theory of quantum gravity has been able to match. It’s not easy being a “theory of everything.” A TOE has the ...