CK-12 Foundation
Ck 12: Life Science: Mass Extinctions
[Free Registration/Login may be required to access all resource tools.] An organism goes extinct when all of the members of a species die out and no more members remain. Extinctions are part of natural selection. Species often go extinct...
CK-12 Foundation
Ck 12: Earth Science: Adaptation and Evolution of Populations
[Free Registration/Login may be required to access all resource tools.] Explains how natural selection favors certain traits in a population so that the organism adapts to its environment, and that changes in the genes over time cause...
Alabama Learning Exchange
Alex: Endangered Species
Learners research and create a brochure project on an endangered species of their choice integrating aspects of math, science, social studies, art, reading and writing. This project allows the students to make connections across the...
Open Curriculum
Open Curriculum: Multicellular Life
To describe the diversity of unicellular organisms which arose over 2 billion years of evolution.