I have taught the Calculus I, II, III sequence since I was a graduate student. Using about six authors, in about 20 different editions. And in three time zones and two languages.

 

During this time I have taught about 40 university classes of Calculus I and 15 each of Calculus II and Calculus III.

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Since 2020 I have tutored both college Calculus I and high school Calculus AP students.

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I have repeatedly seen the absolute necessity of a strong understanding of Algebra for success in Calculus.

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My favorite college calculus textbook is below.