This free math tutoring video explains conceptually the multiplication algorithm when multiplying two numbers between 10 and 19 using Cuisenaire Rods. This helps aid in understanding what the formula is all about. It is important that children know the formula, but it is also important that they know WHY it works. This video explains the “why.”
For more practice, click here to download a worksheet.
This free math tutoring video extends the teaching from the last video, applying it to larger numbers. Once the numbers get too large to easily use Cuisenaire Rods, it is helpful to draw it instead. Children can use representative drawings for smaller problems, too, if they’d like, but some children (and adults!) will need lots of time touching real manipulatives before they are ready to move on to the drawing step and, finally, the symbols alone.
For more practice, click here to download a worksheet.
This free math tutoring video shows you how to introduce the traditional multiplication algorithm (or formula), but in a conceptual way using Cuisenaire Rods as manipulatives. The multiplication algorithm is usually not understood, even by teachers. This video will make clear what it’s all about.
This method will work for everyone, but it works especially well for visual and kinesthetic learners as well as those with dyscalculia/dyslexia, global thinkers, right-brained learners, and others for whom the traditional school approach does not work well.
Before teaching the algorithm, make sure your students have had plenty of practice doing these types of problems with just the rods and figuring them out in their heads! It will be a greater benefit to their future to build number sense that way first and then introduce the formal short-cut method.
For more practice, click here to download a worksheet.