Mathematics teacher Louis Leithold revolutionized the teaching of calculus.

Every once in a while an educator comes along who completely revolutionizes the way his or her subject is taught. This is true of mathematics teacher Louis Leithold of California, who completely revolutionized the instruction of calculus in American high schools and universities.

Louis was born on November 16, 1924, in San Francisco, California. As a boy, he was academically gifted. He attended Lowell High School, an elite public school that accepted only the brightest students in the city. He later worked his way through the University of California at Berkeley, where he earned his Bachelor’s, Master’s, and Doctorate degrees in Mathematics.

In 1968, Louis published The Calculus, a volume which soon revolutionized the teaching of calculus. The book was instantly a blockbusting best-seller, and became the launching pad for Louis’s instructional workshops where he taught his innovative methods to other calculus teachers. One of the people Louis greatly influenced was Jaime Escalante, a legendary educator at Garfield High School in East Los Angeles. Escalante’s experience as a calculus teacher of inner-city minority students is portrayed in the highly-acclaimed movie Stand and Deliver (1988).

During his long and distinguished career as an educator, Louis taught at numerous institutions, including California State University, Los Angeles; the University of Southern California; Pepperdine University; Phoenix College in Arizona; and the Open University in Britain.

When Louis was 72 years old and had already retired from teaching at the university level, Louis inaugurated a calculus program at Malibu High School in Malibu, California. He taught there for eight years. Each year, before the AP test, Louis assigned two to three hours of homework every night. He also held marathon training sessions at his home on Saturdays and Sundays. His teaching methods were praised for their liveliness, and his love for his subject was well known. And the success of his efforts could be statistically documented. While the national average score on the AP exam is 3.01 on a 5-point scale, Louis’s students averaged an impressive 4.5.

Sadly, this talented educator passed away on April 29, 2005, from natural causes. He was 80 years old. You can read more about Louis Leithold in his obituary in the Los Angeles Times at this link: Leithold LA Times.