When my first grader at a DC charter was struggling with reading (behind grade level) at the beginning of the year, his teacher alerted us, told us what they would do to help and let us know what to work on at home. When he still wasn't progressing as well as they hoped, they linked him with the reading specialist for extra support. She meets with him 3x a week, and he has made huge leaps. We correspond with the classroom teacher and reading specialist regularly to monitor his progress. Couldn't be happier with how they've responded.
I've always had a rougher time with math, and I remember being in HS and my Algebra II teacher spending many lunch periods with me when I got stuck on something. I wouldn't have made it through without her!