Straight Punch by Monique Polak
When Tessa gets caught leaving one too many graffiti tags, she finds herself kicked out of school and sent to "New Directions" a last-chance school for troubled teens with an impressive boxing program. Unfortunately, Tessa hates violence and isn't sure how she'll ever fit in given that most of the kids have situations much more dire than her own, but she's not getting out of this.
The backdrop of Montréal (a city with more than a little street art) works well for this coming of age story. I chose to read this while visiting the city, so the setting felt rich to me in ways that it might not have if I'd read it at another time. I was expecting more boxing out of Straight Punch, but actually the thing that struck me most about this were the moments you were seeing the world through Tessa's artist eyes.
I agree that it does feel a little "after school special with troubled teens" but the messages about standing up for what's right and what matters aren't any less true for having been told a thousand times. This book is perhaps better for teens than jaded adult readers, but it's still a nice little story about a teenager finding her inner strengths.