
Here you can find my math applets made in GeoGebra.
They are appropriate for students investigations, exercises and selfteaching.
If you think these materials can help your students understand math better, you can use them in your classes.
However, if you would like to use them for other purposes (e.g. in arcticles, lectures, textbooks, on your webpages etc.), then is necessary to ask and to get permission of the author.
Anyway, all suggestions, comments, corrections etc. would be very welcome. :)
Download:
If you like these applets, you can download GeoGebra files and/or embed these applets. You can find them on GeoGebraTube.
My other materials for teaching math, made in The Geometer's Sketchpad and Power Point, are here.
Fractions

Coloring the fractional part of the figure
How to color the part of the figure, if this part is given by fraction?
What is the meaning of the numerator? What about the denominator?
What are proper and what improper fractions?
Find the answers in these applets.
Also, here is the cake with strawberries, mmmmm...

Express the colored part by using a fraction
How to express the colored part of the figure by using a fraction?
Here are applets for exercise.
Also, here is the pizza, mmmmm...

Mixed numbers  basics
How to color a part of the figure, if that part is given as mixed number?
How to express the colored part of the figure by using a mixed numbers?
Here are applets for exercise.

A fractional part of a group
What is 2/5 of 15 apples? What is the meaning of that question?
Here are applets with explanations and applets for exercises.
Inversely, how to express a part of a whole group as a fraction? E.g. a part of the box of chocolate? :)
Decimal numbers

Decimal numbers on the number line (1st part)
If we devide the distance between two consecutive whole numbers into 10 equal parts,
what numbers are represented by these parts?
What about division between consecutive tenths?
What about division between consecutive hundreths?
Here are applets fot exercises.

Decimal numbers on the number line (2nd part)
In these applets, put the given decimal number to the right place on the number line.
E.g. 1.8 (with one decimal digit), 6.49 (with two decimal digits
and 8.194 (three decimal digits).
Applets for exercise.

Multiply decimal numbers by 10, 100, 1000 etc.
How to multiply the decimal number by 10, 100, 1000 etc.?
Some tricks.
Applets for exercises.

Devide decimal numbers by 10, 100, 1000 etc.
How to devide the decimal number by 10, 100, 1000 etc.?
Some tricks.
Applets for exercises.

Convert lenght and area units
Convert lenght (metric) units from a larger to smaller, from a smaller to larger, and mixed.
Convert area (square) units.
Applets for exercises.
Angles

Transversal
What is a transversal?
What are relationships between angles created by a transversal?
What about two transversals?

Angles with parallel lines and angles with perpendicular lines
What are relationships between angles with parallel sides?
What about angles with perpendicular sides?
Here are applets for investigations and for exercises.
Triangle

Triangle area
Derivative of the area of a triangle in several variants.
Derivative for acute triangle and for obtuse triangle, and comparision.
Real numbers

Square root spiral
How to construct the line segment whose lenght is √2, √3… ?
What is the square root spiral and how to construct it?
Find the answers in these applets.

Square roots on a number line
How to construct √2, √3 etc. on the number line?
How to construct √2, √3 etc.
What about √5, 2√5, 3√5 etc, as well as negative √5, 2√5, 3√5 etc. ?
What about 3√25 and similar ?
Find the answers in these applets.
Fun

The '25 squares' game
Here is the GeoGebra version of one Opera Widget.
Clicking a square will switch its color as well as the color of
all horizontally and vertically adjacent squares.
The goal is to turn all 25 squares red.

