Our understanding of the atom has changed over the past few hundred years! Read about a few different theories on the structure of an atom.

Learn the basic structure of an atom with this introductory page, complete with a fun experiment they can try at home!

Students learn about the relationship between the structure and function of cell walls and cell membranes in this engaging life science worksheet!

Students demonstrate their knowledge of the structure of animal cells in this middle grades life science worksheet!

Students demonstrate their knowledge of the structure of plant cells in this middle grades life science worksheet!

Students take a deep dive into the structure of animal cells in this middle grades life science worksheet!

Encourage students to take a deeper dive into the structure of plant cells in this middle grades life science worksheet!

Students compare structures in the bodies of different organisms in order to draw conclusions about evolutionary relationships in this life science worksheet!

What do a raven, a bat, and a wolf have in common? Similar skeletal structures! In this Halloween worksheet, middle-grade students will explore homologous structures in different animals. 

An animal cell is made up of many different organelles—color them all in this middle-grade worksheet! 

Learn all about charging by friction with this fascinating science worksheet for middle grades!