英文關鍵字
attention
boy
caucasian
childhood
children
class
classmates
classroom
communication
day
development
digital
education
girl
girls
group
handheld
happy
indoors
interest
kids
knowledge
korean
laptop
learning
lesson
listening
maths
mixedrace
pupils
school
schoolboy
schoolchildren
schoolgirl
schoolgirls
sitting
students
teacher
teaching
technology
teens
youth