the poster

(a)  

the computer

(a)  

the backpack

(a)  

the (computer) screen

(a)  

the wastepaper basket

(a)  

the clock

(a)  

the pencil sharpener

(a)  

the (computer) keyboard

(a)  

the desk

(a)  

the table

(a)  

the chair

(a)  

the classroom

(a)  

the door

(a)  

the window

(a)  

next to, beside, to the side of

(a)  

underneath, below

(a)  

in front of

(a)  

behind, in back of

(a)  

on top of

(a)  

above

(a)