We used some youtube videos to help understand the sorobans and the students went to work making the abacus.
http://www.youtube.com/watch?v=Px_hvzYS3_Y&feature=share&list=FLb3QBPNaCFvuf1dE-FddGdA
http://www.youtube.com/watch?v=CvsnftXXKdw&feature=share&list=FLb3QBPNaCFvuf1dE-FddGdA
We used beads and thread and different shoeboxes but many of them turned out to be too big to use well. The successful ones were made from box tops or lids and a few students used wooden skewers instead of thread. I will post pictures of examples soon.
My friend used a popsicle stick method and was happy with those.
In designing and creating them the students were suddenly also using some measurement as well to put it together. It was quite fun watching how the students built there own.
The biggest benefit of using this project was that the students started to understand what base 10 measnt because of the nature of the abacus. We also worked on adding and subtracting with an abacus and the students began naturally understanding why we line up the columns when using these operations.
Here is the criteria sheet that I gave the students: It is also free at my TPT link:
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