9. Education in the US : are we falling behind?

Parents from many countries pay a lot of money to send their children to high schools and universities in the US. It does not seem like education in the US is falling, but I heard that the SAT and ACT is becoming more and more easy because the education standards in the US are falling every year. I’m not sure about this because I tried finding research online, but I could not find any research stating that these tests are becoming easier. Whether or not education in the US is falling behind or not, I know that most of the top universities in the world are still in the US. Harvard and Yale are the top two universities in the world, and there are other top 10 and top 20 schools that are mostly in the US, such as Caltech, University of Chicago, MIT, Columbia University, University of Pennsylvania, Princeton, etc. The average education level in the US may be falling, but the US still leads the world in elite education.