What is that schoolyard song that talks about the life of a girl called Mary?

mary had a little lamb, a little lamb, a little lamb. mary had a little lamb, its fleece was white as snow. And everywhere that mary went, mary went, mary went. And everywhere that mary went, the lamb was sure to go.

It followed her to school one day, to school one day, to school one day, It followed her to school one day and that was against the rules.

It made the children laugh and play, laugh and play, laugh and play, It made the children laugh and play to see a lamb at school.