Determining the proportions of matter in the ecological pyramid Animation Play

Determining the quadrant of the coordinate system Whiteboard exercise Play

Determining the signs of trigonometric functions Student activity Play

Development of the nervous system Slideshow Play

Diagonals of polygons Student activity Play

Different questions Whiteboard exercise Play

Different questions about the same operation Whiteboard exercise Play

Different questions about the same operation. How many times more? How many times less? Student activity Play

Different questions about the same operation. How much more? How much less? Student activity Play

Different systems of blood grouping Whiteboard exercise Play

Different ways of proving Animation Play

Different ways of proving – example as a proof Whiteboard exercise Play

Digital encoding of an image Student activity Play

Digital encoding of an image Whiteboard exercise Play

Digital encoding of analogue signals Whiteboard exercise Play

Digital encoding of analogue signals Student activity Play

Digital image Animation Play

Direct proportion Whiteboard presentation Play

Direct proportion Class activity Play

Discs in the coordinate system Student activity Play

Diseases of the respiratory system Student activity Play

Diseases of the respiratory system Simulation Play

Disorders related to abnormalities in the number of sex chromosomes Slideshow Play

Distance formula in 3-dimensional space Student activity Play

Disturbances in the functioning of the lymphatic system Illustration Play