8. "Best Kept Secret" (2013)

Critic score: 100/100

User score: 6.2/10

Plot summary: "JFK High School, located in the midst of a run-down area in Newark, New Jersey, is a public school for all types of students with special education needs, ranging from those on the autism spectrum to those with multiple disabilities. Janet Mino has taught her class of young men with autism for four years. When they all graduate in the spring of 2012, they will leave the security of the public school system forever."

What critics said: "'Best Kept Secret' is an exemplary documentary: It spotlights an important issue yet never seeks to squeeze the truth into an easily digestible narrative frame. Instead it expands its storytelling to the boundaries of messy, joyful and painful reality." — New York Times