Bath Whiteboard exercise Play

Distance and the time necessary to cover it Student activity Play

Distance and time necessary to cover it Whiteboard exercise Play

Elements necessary for chemosynthesis Whiteboard exercise Play

Elements necessary for photosynthesis Whiteboard exercise Play

Elements necessary to establish a mini reserve Whiteboard exercise Play

Energy necessary for muscles to work Animation Play

Environmental factors necessary for germination Student activity Play

Finding the time of electrolysis necessary to yield a given amount of product Animation Play

How plants obtain the substances necessary for life Slideshow Play

Transporting the sand Whiteboard exercise Play

Why is nutrition necessary for survival? Student activity Play

Work and the time necessary to perform it – part 1 Student activity Play

Work and the time necessary to perform it – part 2 Student activity Play

Writing on the computer Animation Play