It’s easy to get swept up in the hype about artificial intelligence tutors. But the evidence so far suggests caution. Some studies have found that chatbot tutors can backfire because students lean on ...

One evening in the early 1970s, Michael Pachovas and a few friends wheeled themselves to a curb in Berkeley, Calif., poured cement into the form of a crude ramp, and rolled off into the night. 1 For ...