Ione,
I had significant concerns with the first child, but not the kind of concerns I address through CPS. I certainly spent time with this mom, our school social worker spent time with this mom, and things got better to a degree. Mom comes to me if she has parenting questions and I've done a fair amount of coaching with her. She's a very sweet woman who loves her kids and does her best with the info and supports we give her, but her skills are limited.
However, I'd also say that with the older child, it was hard to sift out parenting from issues with the child. If she came to school tired or irritable, it was hard to know whether she struggled with regulation or if she really wasn't getting enough sleep. If she ate like she had a hollow leg at school and stayed skinny, it was hard to know if she had a high metabolism or if she wasn't getting enough at home. With these two it's easier because I've seen the little girl be awake and available for learning all morning and not fall asleep until nap. I've seen them eat regular portions and seem satisfied. So, I'm more likely to attribute these things to issues with parenting.
As far as whether I've talked to mom -- yes, I talk to her almost every day when she picks up the kids. I've called her when the little one falls asleep or throws a tantrum or does something uncharacteristic. When they were with dad I still made sure she had parent teacher conferences, and that I caught her in the hall to tell her of her daughter's achievements. Sometimes, at the kids request, I'd photo copy a piece of work that she did well so that she'd one to show each parent. Mom knew I did those things, and so I don't think she would be surprised that I'm talking to Dad now. Dad knew I did that as well, which may be one reason why he feels he can call me for updates.
Meemee,
Your school has some strange rules. In addition to being a teacher, I'm also a parent and my kids go to a different school. One day I sent my kids to school on the subway with another parent (like a carpool, but she doesn't drive), and then heard there was an accident on the train. I called the school and they instantly told me my kids had arrived safely. I also had a time where I wanted to take my kids out of school for something that I knew would be an unexcused absence, but I wanted to make sure it wouldn't be a huge issue, so I called the school and they told me how many excused and unexcused absences they could have, and how many they'd had so I could figure it out. I wouldn't hesitate to share similar info with my students.
Obviously if there's a custody battle going on, or a restraining order in effect, or the kids were in foster care then that would be different, but the burden is on the parent to inform the school of those things, not on the school to treat every situation as if it is a restraining order. In this case, there is no restraining order.
I've been at this school for many years, and in the district for many more. I do actually know what our school's policies are and I am sure that I am acting within them.