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 assignments aligned to standards for all 50 states that you can 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 Mammal reproduction

Mammal reproduction

Monotremes can lay eggs, but most mammals give birth to live young. Mammals can be marsupial, where the embryo is born at an immature stage and develops in the pouch. Mammals can be placental, where substances are passed from the mother to the fetus so that it can stay longer in the womb.

CK-12 (Middle School)

ESSENTIAL QUESTION:

How does reproduction among mammals differ?
STANDARDS:
RST.2 - Main Ideas

DEPTH OF KNOWLEDGE (DOK) LEVELS:

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