If you have two equations, you can solve for two variables. This rule is a cornerstone of algebra. It’s how we solve for values when we’re given a relationship between [...]

Distractions are bad. Routine, concentration, and hard work are good.  These all seem like common-sense rules for studying, right? Surprisingly (for many people, at least), learning science tells us that [...]

Imagine two friends, Gina and Tina, who are going to a speed-dating event. Gina really,  really  wants a boyfriend. Tina is just going because Gina dragged her there, and she’s [...]

Has this happened to you? You’re reviewing a practice test, and you look at a question you got wrong. “That was just a stupid mistake,” you say, “I should have [...]