Assign this text to deeply engage your students!

Actively Learn provides free ELA, science, and social studies digital content—short stories, primary sources, textbook sections, science articles, novels, videos, and more—and embeds them with standards-aligned assignments to assign immediately or customize for your students.

Whether you’re looking for “The Tell-Tale Heart,” The Hate U Give, “The Gettysburg Address,” or current science articles and simulations, Actively Learn is the free go-to source to help you guide your students' growth in critical thinking all year.

Teaching Origin of species

Origin of species

Speciation, the creation of a new species, can happen through natural selection or artificial selection. Reproductive isolation is necessary for speciation to occur, and this can happen through a geographic barrier (allopatric speciation) or without a geographic barrier (sympatric speciation).

CK-12 (Middle School)

ESSENTIAL QUESTION:

How do new species form?
STANDARDS:
RST.4 - Key Terms

DEPTH OF KNOWLEDGE (DOK) LEVELS:

2,3
Assign this text to your students for free!