NOVA (PBS)

First airing in 1974, PBS's NOVA is the highest-rated science program on TV and has won dozens of awards, including multiple Emmy, Peabody, and Westinghouse Science Journalism honors. The series takes a documentary-style approach to its topics -- each episode exposes and explores many layers of the subject at hand, with an emphasis on the human factor. Episodes cover everything from global warming to a mysterious, modern-day Turkish family that walks on all fours. One program may delve into the mysteries of the ancient Mayans, while another reveals advances in finding a cure for cancer. The approach is always scientific, and most episodes also offer lessons in history, current events, culture, and other scholarly data.

NOVA strives to present complex scientific concepts in easy-to-understand terms and is a great educational tool for teens and tweens. Younger kids can also get a lot from the show if they're able to pay attention, but parents may end up fielding some serious science questions from curious little ones who aren't able to grasp every detail. The show's subject material is wide-ranging and can include controversial topics like human cloning and sexuality, so parents may want to watch along with their kids, or pre-approve episodes on an individual basis. What makes NOVA such a stand-out series is that it really digs into the topic at hand, leaving no stone unturned as it seeks to reveal the human side of its scientific subjects. It's this thorough, investigative approach that makes NOVA such a great learning tool for families.