A: Let's go watch a movie. B: I can't. The SAT is coming up, and I need to cram for the test. ...
A: Let's go watch a movie. B: I can't. The SAT is coming up, and I need to cram for the test. A: I thought you studied for the test for the whole summer. B: No I didn't. I played the entire summer.
Your cram-the-night-before-a-test attitude will get you sooner or later. You should always give yourself enough time to study and prepare for an exam.