MAKE explains LEDs

In honor of this being the first day of classes at PJC, I'm sharing this video from MAKE:



MAKE presents: The LED from make magazine on Vimeo.

My class tonight is called Digital Fundamentals. According to the online course description, the course's "Major Learning Outcomes" are:

At the end of the course the student will be able to:
Use basic trouble-shooting equipment such as the DVM, Logic
Probe, Logic Pulsar, Current Tracer, and the Oscilloscope.
Covert from decimal to octal, hexidecimal, BCD, and Gray Codes
and vice versa.
Analyze and develop a basic understanding of the basic logic
gates circuit operations and functions.
Design basic functional logic circuits given a Boolean equation
or truth table.
Define basic terms and terminology used in logic circuit
operations.
Identify logic symbols used in logic circuit diagrams.
Analyze the operation of a logic circuit diagram.
Identify the characteristics of the major logic families.

Sounds like fun! (Seriously.) Thanks to the electronics class I took last semester, I have at least some clue about what'll be going on.