Frankly, those who put their faith in science are completely missing the point of science. Science as a system is, at its very core, constant in its being volatile. Real scientific minds attack chinks and weaknesses in already established scientific theories, until it caves in to make way for the new theory built on top of its weaknesses (that must promptly receive the same treatment as the old theory) like the reed floors in Venice... there is only extensive observation (many sample numbers, and repeats,) dismissing bias as much as possible, so the conclusion that does seep through must have all the cognitive dross burned from it to have any standing-- and then in with the attacking weaknesses of that conclusion, again. I personally love the method, science and I just jive-- but I recognize it as a
method of finding truth, not the Truth in itself.
Psychic abilities, in contrast, is a very personal thing (maybe like puberty used to be, except less consistent, but now we have things like Health class, yay!) It's all tied in with world view change and soul, taken more on faith and progressed with personal experience rather than something able to be measured from the outside... some parents would be angry that their children are being introduced to the occult, we know some get tetchy at even evolution. A teacher of ESP would have to have a clear enough sight to see how every single one of his or her students are progressing, and grade them accordingly. Frankly, we're mostly based in a material world with not many of those with ESP of that caliber outside of independent study. Even of the few people who have reached that caliber, they would also have to be licensed-- know the theory behind their subject (not agreed upon yet,) the methods to progress in their subject (different methods and especially pacing for everyone,) and how to engage and build a rappore with students (usually remembering what it was like not to know these things, and being able to explain them to the novitiate.)
Also, there's still some misconception (in a lot of people I've met, who are open to psychic phenomena being there at all,) that fully developed ESP is something you're born with. I think it was only a few years ago where an article came out in... Time magazine, was it? That creativity can be taught. Wow
Ever watch High School Musical? Even my friends who are fans of that movie still live to stereotype themselves, "Can't, shouldn't, better off not trying..." they even persist, "I'm just not creative," after I've waved the magazine article in front of them. We LOVE our limits, and most schools I've been to seem to have a hard enough time meeting the material, measurable, academic quota for success. My school now has a meditation and yoga class as an extracurricular-- I wonder how our club leader could check our meditation progress without telepathy, if we're visualizing something else or just half-sleeping in lotus pose for half an hour.
I'm sure Nations would leap at the opportunity to educate their children in ESP if only it were developed as a widely accepted theory and teachable practice -- think of the advantage during times of war! As of now, we just don't have the instruments, or enough sample numbers to measure consistently. We have our testimonies, our experiences to share-- but at this age of the world, it's personal rather than institutionalized. (Unless you're Harry Potter.)