Scarlett, by Cathy Cassidy

Pretty lovely children's book. Scarlett has been expelled from school (again) and her mother packs her off to Ireland to live with her father, his new wife, and her daughter. From her dyed red hair to her pierced tongue and aggressive ways, she has a rough start at the new school there, and soon is being 'homeschooled', by learning about the history of Ireland and the plants and geology of her new home. I thought it was going to veer wierdly off into some kind of myth thing, but it took a nice surprise turn, and was actually very good.