This 12 second
clip shows the students lining up to go home at the
end of the school day. The lady on the right is the
duty teacher for the front gate. As the students pass
her, they should wai her, which is a polite
way to say goodbye. However, notice one student doesn't
do that and she calls him back. On the loudspeaker,
you can hear another teacher calling the names of students.
This is telling them that there is someone here to pick
them up.