"I think it only required basic trig, algebra I and some intuitive geometry before but now requires more advanced knowledge, Is this so"
Yes, this is true.
Geometry is WAY deemphasized in favor of algebra, including higher level algebra (as compared with the SAT test that phased out in January 2016).
There are also way more picky, time-consuming calculations.
And more reading in math questions and multi-step calculations.
Continues to move away from the IQish test it originally was and toward an achievement test that favors those who have had good solid methodical education in the topics it covers and are good at methodical arithmetic calculations.
Probably makes sense to get the College Board's book to see what they cover. It's not expensive. It has the same 4 tests that Khan Academy gives you for free, but with printer costs may not be much difference in price, and the CB also shows you explicitly the concepts covered.
My DD2 is also 11 and going into 6th grade and will probably take the SAT through Duke TIP in 7th grade. The summer after 4th grade, she took Woodcock-Johnson III achievement test and scored in top 1/1000 on the untimed written math section and top 1/100 on the oral math section. She was only 1, possibly 2 years ahead of a standard math curriculum, so most of her high score was figuring things out as she took the test, deducing and guessing from the math she already knew. I can tell you that there would be no way she could cover the math needed for the new SAT (nor the old one) by the middle of 7th grade. In fact, we had very bright kids at our eh public school, who were then taking AP Calculus, who did not know all of the math that was on the new PSAT - found out when they went to a very good prep class. (My DD1 did, but she had studied math outside of school, doing all of the Khan Academy regular math curriculum through precalculus and stat.) At better schools, this is probably not the case, but you see what I mean versus a 12-year-old's typical math achievement.
In order to get a good score - high enough for Duke TIP Center or CTY or whatever - I think that the key is for a kid to know enough math - be a little bit accelerated, a year or two, not necessarily 4-5 years - AND know how to relatively quickly find the questions she can answer, without getting anxious about the ones she can't. My DD1 excelled at this - she was only officially accelerated by 1-1.5 years by the time she took the "old" SAT for the first time in middle of 7th grade, but she did not panic at all on the questions she didn't know how to do, just kept moving steadily. (I would have to go find the test in my archived files to give more detail, but I promise you she skipped a LOT of math questions on the SAT at age 12.) I didn't prep her for the SAT math at that age, other than (1) making sure she knew how to fill in the bubbles on the math grid-ins (it's not intuitive) and (2) giving her two complete SATs (one broken up, section-by-section, over a number of months, the other all at once like the real one) so she could get used to the timing and learn how to skip math problems she didn't know. I did not attempt to teach her any math content for the SAT at that age, none.
Her lowest section score on the SAT at age 12 was in math, but she got a 590, which was enough to take Duke TIP Center courses in science/math if she'd wanted to.
DD2 is more anxious and more rattled by time pressure, but she also wants to go to Duke TIP, probably science classes, so I will have to figure out what she can do to practice to get used to the grid-ins and get ready to skip a LOT of math problems. Because she is easily made anxious, I will have to find a balance between getting her used to the timing and the many hard questions that she won't be able to answer and many more hard questions that she will be able to figure out and the few easy questions that she will already know how to do, versus making her nervous by over-prep. Most likely, I will have her do the same thing as DD1 - taking one test divided up into sections over a number of months, and one complete test. And call it a day.
YMMV. If you're aiming for a higher score, like 700 on math, then your daughter will of course need to know more math. But again, if you're aiming at something like a 590 or lower qualifying score, she doesn't need to know any of the harder math that's on the new SAT, because the vast, vast, vast, vast majority of 12-year-old won't be anywhere near that level of achievement.
