Contact & About

After many years of teaching, I have been fortunate enough to spend the last 30 some years working with calculus teachers all over the USA. If you are a calculus teacher or student, I hope the things I’ve learned and hope to share here will be of use to you and your students.

This blog is for high school calculus teachers and students, and others interested in teaching and learning calculus. It consists of comments, suggestions, hints, and observations on the topics in the course.

PLEASE use the comment links at the end of each post if you have any helpful suggestions or comments on the post. Let me know if you spot a mistake or typo so I can fix it. If you have something longer, please send it to me by e-mail at the address below and I’ll consider posting it separately with your name.

Please share the link with anyone you think might be interested. Thanks, and I hope you find this interesting and helpful.

You may use anything you find here with your students or post the link to your website. Please do not publish it.

The aphorism in the header, “The pleasure lies not in discovering the truth, but in searching for it,” is by Leo Tolstoy from Anna Karenina, Part 2 Chapter XIV


My mailing address is

Lin McMullin

61 Cypress Street

Ballston Lake, NY, 12019


My email addresses are: or 


2 thoughts on “Contact & About

  1. I found your blog today in the search for the answer of ” why derivative of the function id not defined on the closed interval? ”. this question led me to MVT and darboux theorem. I am eternally grateful to your contribution in teaching calculus to some student sitting hundred thousands of miles away from your place.


Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.