to learn more about that, we're joined by rob franek. he's with the college-prep company called the princeton review. welcome! >> thank you. good to be here. >> so, what's changed? >> there are four big changes that have happened for the sat, and these big changes happened in march 2016. the four changes are the sat will no longer be testing on obscure vocabulary words. one of the most difficult things that i'd have for a princeton review student is to give them 500 words that they'll probably never use again to study for the sat, so that fear goes away. number two is that we've eliminated one full answer choice on the sat. so, previous to march 2016, there were five answer choices for each of those questions on the sat. now there will be four answer choices. number three is that the writing section, which was required for the sat before march 2016, is now optional. and number four -- and this is so important. number four is that there is no guessing penalty, which means that for every wrong answer that you get, there are no points off.