"School of Rock" is generally considered suitable for older kids and pre-teens. The film features themes of friendship, self-expression, and the importance of following one's passion, which can be positive messages for young viewers. However, it does include some mild language and humor that may not be appropriate for all children. Parents may want to watch it first or check specific content to determine if it aligns with their values and their child's maturity level. Overall, it promotes creativity and teamwork in a fun way.

One of the most famous lines from "School of Rock," delivered by the main character Dewey Finn, played by Jack Black, is "You’re not hardcore unless you live hardcore." This line encapsulates the film's themes of passion for music and the importance of authenticity. The movie follows Dewey, a struggling musician who poses as a substitute teacher and inspires his class to embrace rock music, ultimately leading them in a battle of the bands. The film celebrates creativity, self-expression, and the power of music in a fun and engaging way.

As of October 2023, "School of Rock" is not available on Netflix. However, streaming availability can change, so it's always a good idea to check Netflix directly or use a streaming search tool for the most current information. You might find "School of Rock" on other platforms like Amazon Prime Video, Hulu, or through rental services.