Good morning, madam

Whenever I walk into a classroom at one of the schools, the children always immediately rise and in unison say, "Good morning, madam.  How are you today?"  When I respond, "I'm fine, thank you.  And how are you?"  They answer, "I'm fine, thank you very much." 

They have obviously practiced this little routine many times and would be disappointed if no one ever showed up that they could actually greet.