academic
aged
amplifier
angry
announcement
announcing
blackboard
board
bullhorn
chalkboard
class
classroom
clock
college
discussing
education
exam
explaining
green
horn
hourglass
late
lecture
lecturer
lesson
loudspeaker
man
megaphone
mentor
mentoring
old
sand
sandglass
school
screaming
senior
shouting
speaker
strict
study
teacher
teaching
time
timer
training
tutor
tutoring
university
yelling