Immerse biology learners in circulation and gas exchange for both simple organisms and higher animals. Six pages of short-answer questions and labelling of the human respiratory system are included. This assignment was written for an...

Students classify themselves according to the six skin types. In this biology lesson, students explore the causes of human skin variation. They present their findings in class.

Students explore the composition and function of blood through a variety of media and hands-on experiences. This lesson is a very good introduction to blood and the circulatory system.

In this reptiles instructional activity, students identify and label the different parts of reptiles. They complete 10 short answer questions after reading the information provided in the instructional activity.