So, one SS (who is in 7th grade) currently has an F and two Ds. He also has a C in his special ed language arts class - meaning he gets lots of extra help. 

DH went to parent conferences (BM didn't go) and several teachers told DH that SS regularly fools around in class, rolls his eyes at the teacher, and plays games on his phone during lessons. DH called him and told him he would have to enroll in two math classes next term, if he ended the term with an F. SS responded that DH was always yelling at him, never listened, and that's why SS doesn't want to come to our house anymore. 

He did bring some math work over the weekend, which I did with him, but it was one worksheet and not likely to improve his grade. Also, when DH called him and told him he needed to bring his grades up, he only had one D and now he has two. 

BM does nothing about the grades. SS has an unspecified "learning disability" that he plays up to the hilt. Saying it's unfair if people expect things from him. DH also has a learning disability - one that makes it difficult for him to process and remember what he hears. He still managed to get all Bs in school, because his parents demanded it and made him sit down for hours each night until he had completed his homework. SS on the other hand, cries and acts like everyone is out to get him when DH says that he is not ok with SS having an F and he is not ok with hearing from teachers that he's rude and fools around in class. 

My bet is that she will go into the school after grades are released and demand that SS be moved to different teachers because the teachers that gave him the F and Ds clearly don't like him. She moved the other SS around last year when he had a C in math class. He had three different math teachers throughout the course of the year. She also moved the other SS's class mid-way through the year in third grade and wanted to move lazy SS's class mid-way through the year in fourth grade, so clearly, this is a BM problem. 

I'm so not looking forward to high school. If SS is failing in 7th grade (in a very small and not very rigorous middle school), what's he going to do when his classes actually become difficult. Also, SSs are twins, so won't it be embarrassing if one graduates from high school a year after the other. This SS talks about when he goes to college, but seriously, DH and BM would be crazy to pay for him to go. If he won't even try hard in the 7th grade, he's not cut out for college. 

This SS also does not work hard at sports he claims to love, so he's a generally lazy person and BM allows him to be that way. She's happier thinking that he's "popular" than she is at trying to make him successful. 

Assuming he finishes school, I will not want to hear the whining from BM when he is unable to do anything productive with his life because she taught him that he shouldn't have to work hard at anything...that is too much for her precious little poopsy.