<p>Do not study over the summer. You will be placed into the math class you should be taking. It doesn’t really matter which one that is. If it’s too difficult, you can easily drop down a level (say, from 151 to 131). It would be unusual for a student who hasn’t taken BC calc to be placed into 153 unless your class covered more than the normal AB material and went into BC topics. A 5 on the AB Calc tends to place students into 152. Lots of students start off at 151, 131, 161, or another math class such as 112. It’s not something to worry about. You will be placed in the level that’s right for you, and if it’s not, you can easily switch.</p>