This dates from 1971 and is one of a series of teacher's aids created by Evans Brothers. This one is called, Fun in the Snow, and shows children playing in the snow, building a snowman, sledging and having fun.
The reverse has a template to make a (slightly alarming) Robin mask.
Overall this vintage school poster measures 60cm x 45cm. It has folds but these do flatten somewhat when framed This will come in a protected envelope rather than a tube.
There are many more vintage school posters in the shop.