Hi, Tam -
It looks like the person who posted on this page (click) has a far weaker memory than yours, but maybe it will trigger your memory.
I checked our School Songbook Index threads and found nothing likely to be your song.
-Joe-

witches on brooms with cats and bats
fly right after dark in their funny black hats
how queer are the noises on halloween night
and then thru the window i see a strange light..
big scary eyes and a big red nose
i get close to mother and curl up my toes,
it's old jack-o-latern, he peeks in the room
a worse looking spook than a witch on a broom.

halloween night is lots of fun
but sometimes i'm glad when it's over and done
it's good to have mother to kiss me goodnight
and know that the witches have all taken flight