The word course in the education context varies depending on which country it is used in. In higher education in Canada and the United States, a course is a unit of teaching that typically lasts one academic term, is led by one or more instructors, and has a fixed roster of students. It usually describes an individual subject taken. Students may receive a grade and academic credit after completion of the course.
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Google really wants you to learn how to develop AI. It's offering the same course it gives to company engineers free to everyone ...
The courses are aimed at developers of all levels.