A free online textbook with a low-cost printed version, full instructor materials, a course administration site, a student self-test site, and much more. The best book there is, regardless of price.
course and test site
My course pages are now hosted on syllabus.space, which is much simpler for both instructors and students than any alternatives. (Students not in a course using the system can also take free finance quizzes here.)
Anderson MFE 404
A first-to-second Corporate Finance course for MFE students, with emphasis on financial statements, comparables, and data and computer programming.
Helping less privileged.
A free IPO teaching case
Old but not badly aged