to popa_bar_abba: The skill of thinking like a lawyer is basically the same as having a good “gemara kup” (head for gemara). It’s the ability to look at system of rules, and to apply those rules to facts. That probably can’t be taught, at least easily (and goes well beyond learning the rules, which is what law schools teach).
The knowledge of English language and substantive academic skills are all acquired by effort and hard work. Even if there is such a thing as an intelligence test, the LSAT isn’t one — it’s a test on the basic skills need for law school and as such, can be studied for.