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Find the misconception
Every diagnostic here is about ten questions on one topic, and every wrong answer choice is tied to a specific, named misconception. You finish knowing which wrong way of thinking cost you the points, and the result page sends you straight to practice aimed at it. Pick a course to start.
Nothing here asks for an account or an email. Solo progress saves in this browser; if your teacher gave you a class code, your work follows the code instead, on any device.
Running this with a class?
Give one join code to a roster and the console shows which misconceptions are active across the class, who shares each one, and which practice to hand out next.