Fun with ‘definitions’ in algebra

WARNING:  use the following definitions with great caution. A number phrase is a mathematical phrase which does not express a complete thought. An arithmetic expression is any grammatically sensible expression made up of numbers and

What is a coordinates system?

This is the first in the series of posts about teaching mathematics and Geogebra tools at the same time. I’m starting with the most basic of the tools in GeoGebra,

Assessing understanding via constructing test items

Assessing understanding of mathematics can also be done by asking students to write test items.  Here’s my favorite assessment item. I gave this to a group of teachers. Possible  answers/