This is a great lesson that we found through one of our resources at school called Math Buddies. It is a prepacked kit with manipulatives, games and lesson plans all packaged up together to use for tutoring or intervention groups. Sometimes, we use activities from it for the whole class....like this
How much is a pound?
Start off with a 8 X 2 inch paper strip.
This represents a pound.
Then fold it 1/2, then in 1/4, then in 1/8ths and finally in 1/16ths.
Label each section - oz. And record in your science notebook!