john, forget them, the studies. they were done before the ipad and smartphones came out and are useless today. the reason kids revert by the third grade is because of our 1850s sit down, shut up, do this, do that, conform and obey curriculum. by third grade our system has sucked all the curiosity out of them, as planned by the people that own education.  i've done studies with kids of all ages and they learn like crazy if they are left alone with the internet and a phone or tablet, even three year olds. my own granddaughter taught herself how to make and upload little pet shop videos by herself when she was five. she is in fourth grade in a very expensive private school now and hates everything about except socializing. i didn't see one tablet in any of the pictures in the article so i pity the kids because i imagine what they are going through in class. what to do is on youtube, we just have to watch what works and copy it.