Materials made in The Geometer's Sketchpad and Power Point

Here you can find The Geometer's Sketchpad (gsp) files and Power Point (ppt) presentations that explain basics about:

I usually use them with projector.

If you think these materials can help your students understand math better, you can use them in your classes. However, if you want to use them for other purposes (e.g. in arcticles, lectures, textbooks, websites etc.), then is necessary to ask and to get permission of the author.

Anyway, all suggestions, comments, corrections etc. are very welcome.

    Fractions    

up

Proper, improper and mixed fractions - introduction and revision      ( zip (gsp), 72 KB )

Expanding and reducing fractions       ( zip (gsp), 9 KB )

Adding and subtracting fractions mentally     ( zip (gsp), 78 KB )

Converting mixed number into fraction      ( gsp, 8 KB )

Fractions on number line      ( zip (gsp), 81 KB )

Changing numerator and denominator   ( zip (gsp), 11 KB )

Multiplying fractions mentally    ( ppt, 2.051 MB )

Dividing fractions mentally  ( ppt, 2.185 MB )

Fractions - Revision   ( pps, 2.294 KB )      

Help file - You can use this sketch if you need pictures with colored parts of figures      ( zip (gsp), 18 KB )

    Decimal numbers    

up

Decimal numbers - basics            ( zip (gsp), 59 KB )

Comparing decimal numbers         ( zip (gsp), 43 KB )

Decimal numbers on number line            ( zip (gsp), 48 KB )

Changing from decimal to other forms            ( zip (gsp), 16 KB )

Help file - you can use this file if you need  pictures with colored parts of figures            ( zip (gsp), 17 KB )

    Integers    

up

Integers - revision   ( zip (ppt, doc), 31 KB )

    Rational numbers    

up

Relationships between fractions, decimal numbers... - PPT presentation for revision            ( zip (ppt, doc), 91 KB )

    Equations    

up

Equality properties - some properties of equalities that kids should understand before introducing equations  ( zip (ppt), 380 KB )

    Functions    

up

Functions - introduction   ( zip (ppt), 243 KB )

    Perimeter and area    

up

What is perimeter?      ( zip (gsp), 21 KB )

Area and its measure units     ( zip (gsp), 18 KB )

Changing between measure units for area (1 dm² = ____ cm ² ,...)       ( zip (gsp), 13 KB )

Areas of rectangle and square      ( zip (gsp), 19 KB )

Area and height(s) of triangle      ( zip (gsp), 21 KB )

Area of parallelogram      ( zip (gsp), 12 KB )

Area of trapezoid      ( zip (gsp), 9 KB )

Circumference and circle area      ( zip (gsp), 9 KB )

    Plane transformations    

up

Line reflection, point reflection, translation and rotation            ( zip (gsp), 19 KB )

Equal vectors         ( zip (gsp), 14 KB )

Adding vectors         ( zip (gsp), 24 KB )

    Pythagoras' theorem    

up

Introduction - discovery of Pythagoras' theorem            ( zip (gsp), 8 KB )

Proof of Pythagoras' theorem - algebraic         ( zip (gsp), 6 KB )

Proof of Pythagoras' theorem - geometrical         ( zip (gsp), 11 KB )

    Space geometry    

up

Parallepiped and cube - basic terms, volume and surface area         ( zip (gsp), 42 KB )

Analogies beween formulas - comparision between 2-D and 3-D formulas         ( zip (ppt), 55 KB )

    Statistic and probability    

up

Introduction to statistic            ( zip (ppt), 351 KB )

Introduction to probability           ( zip (ppt), 123 KB )