*By Joe Pickett, OCW Publication Director*

In the days of high resolution video, lecture notes may not seem like a flashy way to learn, but they represent one of OCW’s most valuable and portable learning resources. Currently, almost 650 course sites in the OCW collection have complete lecture notes, and many other sites have selected notes. Another 67 courses have full online textbooks.

At their most robust, lecture notes can mimic textbooks, with clearly written prose, crisp mathematical notation, and graphs or illustrations.

A good way to zero in on class notes in a subject that interests you is to visit the Teaching Materials search on the OCW Educator portal. Here you can call up a specific subject area, and find all the courses within it that have lecture notes, complete or selected.

But see for yourself in this sampler of recently published courses with lecture notes:

This course discusses theoretical concepts and analysis of wave problems in science and engineering. Examples are chosen from elasticity, acoustics, geophysics, hydrodynamics, blood flow, nondestructive evaluation, and other applications.

- 5.07SC
*Biological Chemistry I*, taught by Professors JoAnne Stubbe and John Essigmann and Dr. Bogdan Fedeles

This course examines the chemical and physical properties of the cell and its building blocks, with special emphasis on the structures of proteins and principles of catalysis.

This course provides students with the basic tools for analyzing experimental data, properly interpreting statistical reports in the literature, and reasoning under uncertain situations. Topics organized around three key theories: Probability, statistical, and the linear model.

- 14.124
*Microeconomic Theory IV*, taught by Professor Bengt Holmstrom. Notes by Lars Stole.

This course studies information and contract theory, encompassing decision making under uncertainty, risk sharing, moral hazard, adverse selection, mechanism design, and incomplete contracting.

- 18.783
*Elliptic Curves*, taught by Dr. Andrew Sutherland

This course presents a computationally focused introduction to elliptic curves, with applications to number theory and cryptography. It works its way up to some fairly advanced material, including an overview of the proof of Fermat’s Last Theorem.

- 18.785 Number Theory I , taught by Dr. Andrew Sutherland

This is the first semester of a one year graduate course in number theory covering standard topics in algebraic and analytic number theory.

This course is the continuation of *18.785 Number Theory I*. It begins with an analysis of the quadratic case of Class Field Theory via Hilbert symbols, in order to give a more hands-on introduction to the ideas of Class Field Theory.