Project 3: Modules  There have been several recent efforts to
provide online learning platforms at a very large scale across
the web. Examples include the Khan Academy, some recent courses
taught to hundreds of thousands of students by Stanford CS
Professors, and offerings from startups like Udacity, edX, and
Coursera. In a seminar at Columbia in March 2012, Daphne Koller
(one of those Stanford Professors) suggested that there might be
a natural unit of teaching (which we'll call a ``module'') that
is larger than a lecture, but smaller than a course.
Characteristics of a module are:  These properties are somewhat
subjective, and you'll need to use some judgment in determining
the appropriate scope for a module.  The goal of this project is
to automatically identify modules from a large number of course
descriptions on the web. We'll narrow down to a single
discipline (e.g., ``college computer science,'' ``high school
algebra,'' ``graduate law,'') and consider the entire syllabus
from many comparable departmen