In Boston, $15/hour SAT, $20/hour MCAT, $18/hour DAT, $17/hour GMAT.
$7+ per hour of prepation needed. You can add prep time that's equivalent of or less than your lession hours (3hr class = 3hr prep time).
If you teach at an off-site (such as a local college), they pay for gas and tiny bit extra (not much).
If this is your first class they pay you $5 less than the above figures.
Usually, DAT courses are not avilable to teach, since there are very few DAT courses at most Kaplan center (more teachers than courses). SAT and MCAT, however, they are constantly seeking for good teachers (they have like 5-6 MCAT courses happening at the same time at my center; compared to 1 DAT). So, I'm teaching MCAT now. ^_^ And, considering teaching GMAT (I'm in a business school now).
Requirements:
1) You should've taken the exam you want to teach within the past 5 years, and gotten top 10 percentile (that's 20-21 for DAT; they look at your academic average, and don't really care about PAT. It is 33(11) or higher for MCAT. Not sure about SAT).
2) Do audition at Kaplan center, testing your teaching skill.
3) Then they put you through 5 teacher training sessions (4 hr each, so 20hr total). Then bam, you start teaching.