NGSS
HS-LS1-2
6 lessons teach this standard. Every lesson is interactive, and every one prints as a worksheet with a separate answer key.
Biology · Chapter 2 · Lesson 1
One division older and deeper than any other.
Honors Biology · Chapter 2 · Lesson 1
Why cells are small, in numbers.
Honors Biology · Chapter 2 · Lesson 2
One connected system, not a list of organelles.
Honors Biology · Chapter 2 · Lesson 4
Ψ = Ψs + Ψp, and the two terms can oppose each other.