My son was hearing impaired for a while because of scar tissue from having many ear infections. When I told his daycare after finding out their response was "that's why we always had to yell at him". I was floored and so upset....why didn't they let me know. I would honestly let the parents know if you don't see an improvement soon. My son ended up needing tubes and was lucky to get his hearing back about a 1 1/2 later. It could of been permanent, his speech was delayed a bit but has finally caught up with his peers.