How do Foster children survive?

This a response I wrote to a homework assignment to respond to a chapter in one of my books. I'm not entirely sure why I'm posting this.

When I was still in High school my mom received her foster care license so she could take in a family of three teenagers that had already been moved around and separated several times. Their previous foster home had finally gotten them all back together when the mother started losing her fight with cancer. When we took them in they were still grieving their previous caretaker, as well as dealing with the normal foster child issues of moving around, or not knowing their real parents. They obeyed my parents for the most part, as well as attended church with us, but there was a definite difference in obeying the rules and living a Christian lifestyle by choice. Since they had not been raised in a Christian home, much less a pastor’s home, so many of the things we took for granted or found common, they didn’t understand. We tried to get them to see things from our point of view, but at times it just seemed like they didn’t get it, or weren’t really trying. Now they are out on their own and we have lost contact. But from seeing the paths they were taking I can guess that they aren’t doing their best. They weren’t living up to their potential. This is something I guess is common with foster homes, because of how much the children are moved around no one set of parents has time to instill proper values into the children. It just hurts me to see kids go through this.