I have taught kindergarten for 24 years. When it comes to comments on report cards, I ALWAYS start with a positive statement, no matter what. This may be difficult with a child that is very disruptive or not doing well in school, but is something you have to do before you zap the parent with what is not good with their child. You can tell the parent in that comment almost anything constructive that needs to be done after you lead off with the positive statement. I'm not advocating that I lie about this positive as I really believe that there is always something you can find to say that the child does well. It really makes my job during conferences go better when I share the comment sheet with the parents.