The thrust of sex education classes taught in Tennessee schools will stay the same under a controversial bill awaiting the governor’s signature, according to the Department of Education. The so-called “gateway sexual activity” bill seeks to punish teachers and third-party groups that promote “sexual contact encouraging an individual to engage in a non-abstinent behavior” and rewrite state code to emphasizes abstinence education — both issues that caught the  national spotlight this year. “It really will not do much to change the current curriculum, the ways schools operate currently,” said Kelli Gauthier, a Department of Education spokeswoman.