Middle and high school students studying SNSD?

Girl group SNSD has expanded into textbooks. Recently, it was revealed through an online community website that SNSD was in a 2nd-year middle school music textbook - gathering much attention from fans and netizens. The textbook contained a photo from SNSD's promotional "HaHaHa Song". Also, netizens were really interested to find out that SNSD were also published in a 1st-year high school textbook. They commented, "The music textbooks these days have gotten a lot better from when I used them", "Does this mean SNSD's musicality is being recognized?", "This is totally awesome! A textbook like that is worth studying", and "Definitely, right now is Girl's Generation!" Source: TVReport via Nate