Chalkboard and men with graphic balloons drawn 24
A blackboard on which a balloon of a graph is drawn and a man 3
Male in coughing white costume 2
Girls doodle 12
Chalk and blackboard eraser
Businessman with luggage 9
Elementary school student studying with a teacher taught by one desk 5
Gift box and couple (top view) 12
Gift box and couple (top view) 18
Classroom
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Picture written in chalk 12
Chalk character 36
Tequila time 3
Line written in chalk
Instructor checking on students during class
Male wearing a white coat carrying a book 1
Female college student reading a book in front of the blackboard 2
Businessman with luggage 2
Draw on blackboard 3
Men in the graph on the blackboard 10
A blackboard on which a balloon of a graph is drawn and a female 12
Male calling in front of the blackboard on which the graph is drawn 2
A blackboard with a line graph written and a woman 11
Drawing on a blackboard 7
A blackboard with a balloon of graphs and a female 28
A woman explaining on the blackboard 11
A blackboard on which a balloon of a graph is drawn and a woman 29
Blackboard with a line chart and female 24
A blackboard on which a balloon of a graph is drawn and a man 7
A person is writing chalk on a blackboard with chalk 3
See the graph on the blackboard Male 4
Male wearing a white coat to sams up 2
A sign
Painting on the blackboard 6
Elementary school student 2 writing on the blackboard
Couple with blackboard
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