From the school
From the home
Conversational flow and useful expressions
What you will do
Although 「おはようございます」(ohayo gozaimasu), or “good morning”, is an acceptable greeting, since your child’s teacher is making a suggestion based on his/her concern for your child, you may instead want to use「いつもありがとうございます」(itsumo arigato gozaimasu), meaning “as always, thank you”, or 「いつもお世話様です」 (itsumo osewa sama desu), meaning “as always, thank you for your support”.