I am from Nebraska, like the OP, and I got even less (Papillion Lavista School district, if you care to know, which is in Sarpy, that STD/Pregnancy ridden quasi-Hellhole) sex ed than he did.
Mine consisted of a 12 minute video in 5th grade in which sex was mentioned to exist in the same way nuclear missiles were (dangerous and not to be screwed around with). In 8th grade, I got a Half Semester (the other half was G.R.E.A.T., gang resistance education and training, the biggest waste of time ever in Papillion, Nebraska, which has one three-man gang the last I bothered to check). The half semester course consisted of one day of mechanics, one day of birth control, and the rest on abstinence, STD's, and how horrible Teen Pregnancy is (did you know that if you get your GF pregnant, she will have the child, abandon you with it, and then mail you letter bombs?). In the end, I learned the way most people do- Porn, and awkward conversations with parents when they discover said porn.
To defend Nebraska's pregnancy and STD rate for a moment, you must understand that there isn't much else to do out here. Not kidding. Boredom driven sex has to be the leading cause of all the negative stuff. My solution involves the proposal to introduce all teens to WoW upon hitting puberty, ensuring that they will get jobs to pay for it, and not have exposure to sunlight or the opposite gender.