... a board.
That is a board.
... a rubber.
That is a rubber.
... glue.
This is glue.
... a map.
This is a map.
... paper clips.
Those are paper clips.
... a globe.
This is a globe.
... drawings.
These are drawings.
... desks.
These are desks.
... a ruler.
This is a ruler.
... scissors.
Those are scissors.
... chairs.
These are chairs.
... calendars.
These are calendars.
... doors.
These are doors.
... markers.
Those are markers.
... a school bag.
That is a school bag.
... copy-books.
Those are copy-books.
... windows.
These are windows.
... clocks.
Those are clocks.
... paper.
This is paper.
... a pencil.
That is a pencil.
... a copy-book.
That is a copy-book.
... paint.
That is paint.