## The Abacus in the Classroom

Consider having the students build their own abacus as a class project.

### Do-It-Yourself

Instead of purchasing abaci for use in class, consider having the students build their own abacus as a class project by bringing various items from home, or purchased in a craft store, by the school; e.g:- popsicle-sticks to build the frame (an Origami box makes a neat
frame, too);
- drinking straws or pipe-cleaners for the rods;
- for the beads use, metal machine-nuts or washers,
Cheerios™ (preserved with some thinned; glue and poster paint),
or macaroni or plastic decorative beads.

However, if you are insistent on purchasing abaci for your classroom, please refer to the FAQ for some suggestions.

### Popsicle-stick Abacus

Edward Barnique, a 5^{th} grade teacher, built an abacus
with popsicle-sticks (local copy of the page).

### LEGO Abacus

LEGO maniacs can either use my plans to build a LEGO abacus or design one of their own, like Eric Harshbarger built.

### Abacus Lesson Plan

Leah Tait suggested this classroom lesson plan about the abacus, with instructions for building an inexpensive abacus.

## Mathematics & Science Links

- Interactive Mathematics Miscellany and Puzzles
- A feast for the eyes; a banquet for the mind! You will leave
hungry for more!
- POP Mathematics Archive
- Did you ever wonder what makes math teachers get so excited
about some topic in Mathematics? The POP Math Archive collects items
about mathematics which may explain this wierd behavior.
- Math Forum
- A center for teachers, students, researchers, parents, educators
and citizens who have an interest in mathematics education.
- Mathematics Gems
- Frank Potter's Science Gems.
- Eisenhower National Clearinghouse for Mathematics and Science
- ENC provides K-12 teachers with a central source of information on
mathematics and science curriculum materials.
- PBS TeacherSource
- Recommended educational resources on the web
maintained by PBS.
- Byrne's edition of Euclid (link no longer available)
- In 1847, a
mathematician named Oliver Byrne published a book covering the first
6 books of Euclid's
*Elements of Geometry*, which deal with elementary plane geometry and the theory of proportions. It presents Euclid's proofs in terms of pictures (in color), with as little text as possible.