Take another look at the sentence:

Jacques, a self-taught computer whiz, always hates going to his Introduction to Microcomputers class the reason is that both his textbook and professor are at least a year behind when they discuss software and internal components.

No punctuation of any kind is necessary between is and that. The reason is is a main clause that begins a complete sentence. That both his textbook and professor are at least a year behind is a subordinate clause. Generally, when you attach a subordinate clause to the end of a main clause, you need no punctuation.

Go back to the sentence to try again.

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