Introduction

This is a collection of activities developed by many different mathematics educators from many different countries. Some of the GeoGebra pages were translated to English, others edited and some are presented as is.

This collection provides examples of what is possible using GeoGebra to teach mathematics.

Fractions

Model comparing and ordering fractions.

• Simplifying Fractions
• Improper to Mixed Numbers
• Locate Fractions on a number line

Decimals

Model, locate and order using a number line.

• Fractions to Decimals
• Locate decimals on a number line
• Order decimals
• Order fractions, decimals and percent

Fractions Operations

Model operations with fractions using area models.

• Adding Fractions
• Add and Multiply Fractions
• Multiply and Divide Fractions

Integers Operations

Model operations with integer using a number line.

• Adding Integers
• Adding Integers with counters
• Subtracting Integers
• Integer Difference

Functions

Investigations and Assessments

• Investigate Square Root Function
• Square Root Assessment
• Investigate Rational Function
• Rational Function Assessment

Triangles

Investigations

• Similar Triangles - AA
• Similar Triangles - LAL
• Similar Triangles - LLL
• The Scarecrow´s Claim

Complex Numbers

Model operations with complex numbers using vectors.

• Adding Complex Numbers
• Subtracting Complex Numbers
• Multiplying Complex Numbers
• Dividing Complex Numbers

Probability and Statistics

Learning about central tendencies

• Finding the Mean
• Physical Model of Mean
• Dice Simulation

Illusions

What you see is not always what is real.

• Are they horizontal lines or not?
• Do the colors change?
• Are the segments congruent?
• Are the lines straight?