Horse to fly, multiply.
Fly to horse, divide, of course.
This has really stuck better with the kids than anything I have tried over the years. They can identify big to small multiply and carry it in their head.
Horse to Fly = Poster/Anchor Chart with Cards for Students
A Poster/anchor chart to put on your Math Vocabulary board to use as a reference.
Along with cards to use as bookmarks for a quick reference.
Also included is a 24inch x 36inch (poster size) JPEG file included, so you can get the actual poster printed. Just take to your local copy shop and have it printed in poster size.