A woman drawing a graph on a blackboard 5
A blackboard on which a balloon of a graph is drawn and a man 10
Men and women in front of the blackboard on which the graph is drawn 3
Male calling in front of a blackboard on which a graph is drawn 1
A blackboard on which a balloon of a graph was drawn and a female 5
A blackboard on which a balloon of a graph was drawn and a female 19
Blackboard with line graph written and female 16
Blackboard written with a line graph and male and female 5
A woman drawing a graph on a blackboard 11
Blackboard written with a line graph and female 23
percent
Instructor teaching while looking at students
recycling
Step-up goal
A high school student who puts his hair on his ear in front of the blackboard
Female with a mini blackboard
Male in a white suit facing behind
A girl scribbling 1
A blackboard hung on the wall 24
Characters written in chalk 59
Chalk character 37
Curves written in chalk
Characters and pictures 1 written in chalk
Blackboard and girl 2
Blackboard and girls 9
Elementary school student writing on the blackboard 4
Chalk character 13
Gift box and couple (top view) 1
note
A high school student in a sailor suit looking at the camera with a bag
Male in white coat bending arms 2
A high school student in a sailor suit looking at the camera with a bag
YES NO (check YES)
High school students taking classes with pens on their chins
Elementary school teacher 5 in front of the blackboard
teachers and students to teach
moon cake
Children and mothers drawing on the blackboard
Teachers to teach and elementary school students 15
Gift box and couple (top view) 29
Gift box and couple (top view) 27
Gift box and couple (top view) 34
A blackboard 32 hung on the wall
Blackboard hung on the wall 34
A person is writing chalk on a blackboard with chalk 4
Female 3 explained on the blackboard
Blackboard written with a line chart and men and women 2
Blackboard written with a line graph and female 29
A blackboard on which a balloon of a graph is drawn and a man 25
A blackboard on which a balloon of a graph is drawn and a man 5
A blackboard on which a balloon of a graph was drawn and a man 27
A blackboard with a line chart written and a man 4
Blackboard written with a line graph and female 38
A blackboard hung on the wall 26
Blackboard hung on the wall 17
Male drawing graph on blackboard 7
Female 1 explained on the blackboard
Blackboard with line graph written and female 27
A blackboard with a balloon of a graph drawn and a female 22
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