Homophones - words that sound the same but have different meanings and spellings.

Examples of Key Stage One homophones:

bare bear
be bee
blue blue
here hear
there their they're
night knight
one won
quiet quite
see sea
sun son
to too two  

been bean
four for
new knew
no know
pair pear
red read
right write
wear where
sew so saw
tail tale
through threw
week weak
which witch