Explore Lab
All categories
Math exploration
Move vectors, rotate axes and watch the rules of mathematics play out.
The right-hand rule in 3D
Rotate the axes, compare right- and left-handed systems, and watch the cross product appear.
Broken Keys
Most keys have fallen off this calculator. Default setting: four timed levels. Custom design: choose the working keys, up to 12 targets (positive or negative) and a time limit, with feedback on hard targets. Game's choice: pick Simple, Intermediate or Advanced and the game sets the keys, targets and time.
Vector form of a line in R²
Seven click-through steps: from a point and a direction vector to r = r₀ + tm, then plot points from a worked example.
Broken Calculator on Math Is Fun
Another take on the same idea, on another website. Opens in a new tab.