Materials

Unit Circle (GSP); Random Variable (GSP);

Perspective (GSP from here, see here);

Probability Tools (GSP); More Tools (GSP);

Random Variables (ggb), Modeling (ggb)

SOME EXCEL FILES: Hondt; Prime Factorizations; Jefferson; Correlation; $'s Utilization (Times Table);

Statistics (Also a ggb file here); Proportionality; Assortment;

Trinca-Espinhas game (tutorial; see also Office Files with Puzzles); Stem-and-Leaf

ASTRONOMY: Solar System (ggb); Perpetual Calendar (ggb, details here); Synodic Period (ggb); Quadrant (ggb);

GPS System; Epicycloid

ELEMENTARY MATHS: Area Formulas (ggb), Geoplans (ggb); Fractions (ggb);

I like the books Arithmetics for Parents By Ron Aharoni and

Knowing and Teaching Elementary Mathematics by Ma Liping

Previous

ABSTRACT GAMES: Strategy (Games of 7th Portuguese Championship of Mathematical Games); Robin System (Excel File);

ppt with a lot of information; Printable boards (buy glass beads for aquarium);

Office Files with Puzzles

3D GEOMETRY (CABRI3D): Referential; Systems of Linear Equations (3 equations); Cube Planifications;

Volume of a Sphere (drag the red point); Volume of a Pyramid; Conic Sections

(all sketches here)

2D GEOMETRY (AND OTHER STUFF) (GEOGEBRA E GSP): Exponential Growth (ggb, paper fold experiment);

Rate (ggb); Pythagorean Theorem (ggb); Plane Isometries (ggb);

Durer's Spiral (ggb); Flat Regions (ggb); Conditional Color (ggb); Pi (ggb);

Statistics (ggb); Trigonometry (ggb);

Initial