schoolyard
加入词篮ring
headmaster
headteacher
timetable
break
rest
library
librarian
mention
playground
midfield
experiment
lab
instrument
drop
canteen
topic
list
warn
late
arrange
credit
flag
teach
teacher
instruction
coach
train
trainer
training
well-trained
classroom
blackboard
chalk
desk
row
homework
study
science
memory
recite
remember
comment
record
recorder
diary
learn
attention
mind
textbook
book
brochure
bookmark
page
bookstore
bookshop
schoolbag
eraser
rub
pen
ink
pencil
pencil-box
pencil-case
mark
notebook
exercise
exercises
paper
question
answer
reply
key
problem
difficult
difficulty
solve
saying
handwriting
practice
practise
notebook
revise
review
professor
maths
math
add
addition
plus
and
minus
multiply
double
twice
difference
value
