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This PDF presentation introduces microbes and provides an activity to estimate the mass of microbes in the human body.

Learning games, educational comics, reading activities, and more.

Fun home activities for kids interested in science.

4th grade science

Site is a quiz about the function of organelles. Easy to use and great practice for students.

Great Cross-Section of animal cell…neat and simple drawing

Great Cross-Section of plant cell…neat and simple drawing

Zoom in as if you had an electron microscope