... and we shall teach Rock & Roll to the world.

Rating: 8/10 (16 December 2017)

I'll only be reiterating what others have said, and what you've already guessed; is that this movie just works.
By a lesser director, by a lesser writer, by another actor, School Of Rock might have become among the thousands of cheesy, Nickelodeon-esque, Disney-esque, tween movie. Thankfully, Mike White wrote such a charming though admittedly predictable story, and Richard Linklater steered the this ship safely to land; of a musician way past his time trying to make it big and somehow found inspiration in a classroom full of children of a stuffy school.
Jack Black not only nailed his part, he owned it and killed it. Black is charismatic, enthusiastic, energetic and infectious. He is just fun to watch. Everybody else played their part well, even Joan Cusack who I think is underused. The best part here, must be the process of music making; what it rock, what does it mean to rock, and why rock and roll is so much fun.
This movie is fun. And you won't be disappointed by it.