It ends like this, largely cancelling out the rest of the article:

>In the second iteration of the circle, all of his notes are completely useless, and all of his initial attempts to teach anything fail, because these are different kids with different aptitudes and different interests. Zvonkin, raised in a communist society and a believer in the absolute malleability of human nature, is fairly bowled over by this, especially by how young all these differences are manifesting. Reading between the lines, it sounds like he got quite lucky with his first set of children, and that the second group were much more challenging to teach.8 The most eloquent testimony to this is that after about a year he gives up, and the journal ends abruptly.