This is foamcore.
I found large sheets of foamcore at Wal-mart for under $5, I sliced some 2″ strips, out of which I cut rectangles of varying sizes. All/No doesn’t need a big rectangle, but P/non-P does.
I also found magnet strips in the craft section. They are backed with tape, and can be cut to make the teacher pieces.
All S is P.
Okay. I’ll show you how I do the Contrapositive.
Do the Obverse: “pull down” the All to No…
…and the P to non-P.
Slapping these cards on the metallic whiteboard is very satisfying.
Now we switch S and non-P by Converse, and get this.
By Obverse again we get the final result.
Mother of six, wife to a forester and educator, former homeschool teacher and tutor with Classical Conversations. Now retired from teaching music at a small Christian school. In my retirement I am quilting, decluttering, and calling country dances--contra dances and more for people in my community who want to get out again.
Love it! Great for hands on kids!
Very cool! Simple and memorable!
Thank you Ruth. This is exactly what I was looking for.
It helped me and my students. It takes an abstract concept and makes it concrete. Glad you can use it!
What’s on the back of “is”?
Good question! On the back of “is” you write “is not”.