NGSS
1-LS1-1
4 lessons teach this standard. Every lesson is interactive, and every one prints as a worksheet with a separate answer key.
Grade 1 Science · Chapter 4 · Lesson 1
Every part has a job.
Grade 1 Science · Chapter 4 · Lesson 3
Hiding, hard shells, and sharp spines.
Grade 1 Science · Chapter 4 · Lesson 4
Copying Nature to Solve a Problem
Steal a good idea from a living thing.