Animated programming is not generally targeted at this demographic; cartoons that are aimed at teenagers generally feature more crude humor than those oriented toward younger children. Educational programming targeted at this demographic has historically been rare, other than on NASA TV's education block (this has somewhat changed with Litton Entertainment's entry into educational television in the early 2010s). However, some programming aimed at the demographic has had some tangenital educational value in regards to social issues, such as the now-defunct T-NBC block of sitcoms, which often tackled issues such as underage drinking or drug use.