When my son did it, the sections were:
Reading, 42 questions
Writing and language, 40
Math without calculator, 15
Math with calculator, 25

He got a total score out of 1440 and two subscores: R/W and Math (out of 720 each)

College board has a little on it:
PSAT 8/9

It doesn't seem that different in style from the PSAT 10 or PSAT NMSQT.I would just review on Khan Academy SAT if your child is looking for some practice.