teacher holding chalk and book on green chalkboard background
Palabras clave
50s,
attitude,
blackboard,
chalk,
blackboard,
class,
classroom,
cognition,
college,
contact,
elementary,
executive,
cognition,
learn,
lecture,
lesson,
prof,
school,
study,
instructing,
teacher,
tutor,
university,
education,
science,
student,
smiling,
employee,
concentration,
lecturer,
professional,
person,
book,
confidence,
work,
first,
happiness,
lady,
looking,
plain,
model,
goggles,
showing,
middle-aged,
confident,
standing,
call,
delivery,
device
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