Got questions about the reapportionment process? The U.S. Census Bureau has released an animated video to answer them. It's no “Schoolhouse Rock,” but it does run through the equation for dividing up the House's 435 seats.
It doesn't, however, explain redistricting, which is a state-specific process that begins next year. Each state will redraw their congressional boundaries based on the Census reapportionment numbers, which will be released before the end of the month.
(h/t Swing State Project)
--Updated at 5:17 p.m.