Courant Institute New York University FAS CAS GSAS

Welcome to my website! Here you can find information about courses I teach, coordination efforts among the departments introductory-level courses, web education practices, LaTeX hacks, and many other random items that interest me. If you want to get in touch with me, see the "Contact" link.

A new chapter

Saturday, September 18, 2010 - 7:59am

So I've been teaching calculus for over 10 years, almost (with the exception of one summer) exclusively out of some flavor of Stewart. And I've been a fan of the web and delivering content over the internet since beginning—I was cobbling together course web pages in the 90s before Blackboard and fancy content management systems were around.

Conference tweets broadcast beyond hotel ballroom

Saturday, July 18, 2009 - 6:44pm

This is not a "Why I tweet" post nor is it a "What twitter is for" post. But it's a nice anecdote about how twitter works in interesting ways.

We've just wrapped up the 12th annual Legacy of R.L. Moore Conference in Austin, Texas. It's one of my favorite conferences and I decided to see if I could organize some collective twittering.

The sky is not falling (anymore? yet?)

Thursday, March 19, 2009 - 12:25am

A few months ago David Bressoud (incoming president of the MAA) wrote an article for Notices of the AMS called "Is the Sky Still Falling?" It refers to a 1995 Notices article (titled "The Sky is Falling") which worried about a rapid decline in the number of students enrolling in mathematics courses.

Bressoud's article contains good news and bad news. The good news is that enrollment in college math courses is up. One bit of bad news is that enrollment in all college courses is up, too, and the percentage of enrollments which are math courses continues to drop.

Tooting my own horn

Wednesday, March 4, 2009 - 8:58am

I'm happy to announce that I've been awarded a grant from the Educational Advancement Foundation to develop a graduate student/postdoc teaching seminar.

Contact me

Courant Institute of Mathematical Sciences
Warren Weaver Hall 726
251 Mercer Street
New York, NY 10012

(note: the mailing address of the building is on Mercer St., but due to construction the main entrance is from a plaza at W. 4th St. and Greene St.)

email: leingang (at)
telephone: 212-998-3107