(1) Jewish kids in a traditional family learn to read pretty early, because theirs need to understand the Torah. They usually know at least a bit of a Semitic language, and they are functionally billinguals. Besides, they learn history from the Bible. Even more, Jewish tradition has the Kabalah as an integral part of the culture. And Kabalah is a mystic numerology. So, do you wonder from where the love to numbers come from? When Jews finally comfront the topics tought in the Western curricula they are already familiarized with history, linguistic, mathematics, traditions, psycology, etc. So no wonder they do well.