CK-12 Foundation
Ck 12: Third Grade Science
[Free Registration/Login may be required to access all resource tools.] This is a science text for Grade 3. It has sections on physical science, earth science, and life science. Each of those is broken down into 3 to 5 topics.
CK-12 Foundation
Ck 12: Third Grade Science
This customizable digital textbook covers topics related to third-grade science. It is Next Generation Science Standards (NGSS) aligned.