These notes are intended to accompany my string theory for undergraduates course, first taught in the spring semester of 2017. The material herein are based on Barton Zwiebach's excellent textbook "A First Course in String Theory,'' 2nd Edition, 2009, Cambridge University Press., in the hope that they would serve my students as easy reference as well as put in perspective the 'big picture.' The notes are perpetually a work in progress and I will continuously update them. The reading assignments I gave to the class are listed in the appendix. If you are teaching yourself string theory using Zwiebach's book, you might want to follow these readings and use the notes as a supplement. The order of the material as well as the content was chosen for students who come in not necessarily knowing special relativity, advanced electrodynamics, or quantum mechanics. The only prerequisites to this class were introductory physics and multi-variable calculus.
