Out In The Open
Author: Dan Katz
Each of these images is shown on the page for a course on MIT's much-hyped OpenCourseWare (aka the organization which wouldn't let me post an Enigmatology course for the weekend.)
The courses are as follows:
Treating the courses as numbers with decimal points, for the equation to hold the ninth picture must represent 16.01. The picture for 16.01 is the same size as the ninthpicture, and the spot marked "answer" is in the same place as the word FLUID.