Long story short, my son (age 15) has been living with his mother (and her dipshit husband) for the past three years. She fed him a load of BS how he should be living with her, etc, and the senile judge ignored all evidence that she violated the Judicial Guidelines of Divorced Parents (Oklahoma), involved him in the divorce, etc and switched homes. Since then, my son has slowly figured out that she and her husband are idiots and I don't think he wants to admit it, much less state that he'd like to live with me. My ex does just enough bribery with material objects to keep him duped. He's extremely intelligent; however, my ex comes from a family of complete ignoramuses. She treats school like a day care and does not encourage learning outside of class. Because of this, he's suffered in math by scraping by with a D in pre-algebra this year. It pissed me off for many reasons, mainly because he was a stellar student when he lived with me as I would always work with him. Anyway, she "warned" me earlier this year that he would have to repeat algebra next year. It's bad enough that she had him repeat the previous year's math when he went to live with her (he enrolled in school 4 days after classes started ) and he was complacent that whole year. Don't even get me started on the approach she took for his being tutored. It was a complete joke. Anyway, I want to work with him over the summer to get him up to speed on Algebra. I need some recommendations for some books and material. Meanwhile, I'm working to correct the issue of his living with mom. Oh, don't bother asking about her husband. The guy is so stupid that he literally can't dress himself.