![]() In your math curriculum or district-purchased book, it will most likely give the abstract means or potentially the pictorial, but remember: we need kids to have CPA – Concrete, Pictorial, and Abstract. The abacus can be used in 1st grade all the way through 5th. Once students get about halfway through 1st grade, we need to transfer them to an abacus. ![]() They actually have a very similar functionality, but they only go up to 10 or 20. The rekenrek (demo size or a homemade version) or a Counting Buddy is a more appropriate tool in a preschool or Kindergarten classroom. While we are about to discover the incredible versatility of the abacus, please note that an abacus it can be overwhelming for our youngest students. Students can practice subitizing, conservation to a number, addition, subtraction, place value, multiplication, division, fractions, and even decimals! But an abacus can actually help students learn and practice many mathematical concepts in a very developmentally appropriate way for students in elementary school. At one point, I thought an abacus was something you’d see at IKEA or in a childrens’ nursery or playroom as a decoration. The abacus that we use in the United States is called a Danish abacus, and it is in line with our base-10 number system where each row of the abacus has 10 beads, and it has 10 rows to equal 100. It can be called a number rack, a 100 rekenrek, math rack, abacus, 100 bead rack – people have come up with a million different names for the same tool! There are actually many different types of abacus that are available – Chinese, Japanese, Russian, Polish, German, Roman – to name a few, and they are based on different number systems.Īn abacus has many names as well. ![]() Sometimes we see videos from places overseas where kids are very accurately calculating things and flipping through beads very quickly. Did you know there are many different types of abacus?
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