How do the SAT subject tests work?

Question

Are they like the SATs, but you are given three different ones and some one watches your timing to make sure you get an hour for each?

Answer 1

They are taken individually and separately. You don't get three of them at once.

Answer 2

Basically, you start at 8am. You're given an answer sheet and a huge book of tests--if you decide to change tests that day (French instead of Math I, for example), it's okay, as long as you enter the correct test code.

Then, yes, you are timed for one hour. When the hour is over, there is usually a short five-minute break. Then the next test begins. You can take as many as three SAT Subject Tests in one day.  

Answer 3

They're kinda like the SAT, but there are some big testing administration differences, too.  First, they had everyone the same huge booklet of all of the subject tests and the multiple choice answer sheet.  The proctor tells everyone how to fill out the bubble sheet, etc.  

The proctor gives you an hour to take the first subject test (you can pick any test you want, even stuff you didn't register for).  After the first one is done, the proctor collects the answer sheets from people who only registered for one subject test, and those people get to leave.  You get a few minutes break.  Then the next one starts; you're timed for one hour, and then people who only registered for two tests leave, there's a break while they leave, and then the people who registered for three tests (there's usually not a whole lot of people left at this point) stay, finish, and then they can leave after the hour's up and their forms and everything are collected.