Decimals can be a tricky topic for students. Here is a short video to show the power of using Linear Algebra Blocks (LAB or Decimal pipes or decipipes) to support your students' understanding of decimals. I think every classroom should have these readily available for students to use.
If you would like your own set of decimal pipes please see the Products page.
I have also included a video I took many years ago in my classroom to show you how I used my one set of decimal pipes in a "fishbowl" scenario to introduce multiplying decimals.