Wooden frame: polished smooth without burrs, does not hurt the hand Large size makes teaching more convenient Removable positioning: teaching is more convenient, abacus math calculation tool is very suitable for math education. Design: There is one bead on the top and four beads on the bottom. Educational tool: used for practicing and learning math, because it can help you remember more content, thus improving learning efficiency. Using an abacus as a math teaching tool can make math practice more effective, is a good way to teach calculation, and makes learning much easier.