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Teacher and child test tubes. Perseverance pays off. Chemical experiment. Symptoms of ADHD at school. Schoolboy cute child experimenting with liquids. School lesson. Educational school program.
Keywords:
men
education
teaching
studying
childhood
child
indoors
caucasian ethnicity
teacher
blackboard
school children
science
student
classroom
schoolboy
males
school building
scientist
elementary age
professor
learning
boys
desk
intelligence
scientific experiment
research
beard
chemistry
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