Your course
Your path
Everything in the course, in the order it is worth doing. You can jump around freely - this is a map, not a gate.
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1
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2
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3
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4
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5
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6
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7
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8
Modules count as done once every item reaches familiar, which is three correct answers in a row. That is deliberately short of mastered: the aim is to know something well enough to move on, and you keep meeting all of it again while reading.