String Theory for Undergraduates
MIT OpenCourseWare offers this introduction to string theory built around Barton Zwiebach's textbook A First Course in String Theory. The course treats string theory as the quantum mechanics of a relativistic string, so it starts from special relativity and basic quantum mechanics before building up the machinery, and it assumes students already know electromagnetism and statistical mechanics. Lecture notes, problem sets, and exam materials follow MIT's standard OCW format, walking through the relativistic string action, quantization, D-branes, and string interactions at a level meant for undergraduates rather than graduate specialists. There is no instructor video series, but the full set of written course materials is available to download and work through independently. No certificate is offered, consistent with MIT OCW's model of free, open publication of its actual course content.