NGSS
HS-PS1-7
13 lessons teach this standard. Every lesson is interactive, and every one prints as a worksheet with a separate answer key.
Physical Science · Chapter 4 · Lesson 3
You may change how many, never what.
Chemistry · Chapter 4 · Lesson 1
Writing and Balancing Equations
The coefficients are forced, not chosen.
Chemistry · Chapter 5 · Lesson 1
A counting unit, sized to make weighing work.
Chemistry · Chapter 5 · Lesson 2
Grams to moles, and back.
Chemistry · Chapter 5 · Lesson 3
Three steps, always the same three.
Chemistry · Chapter 5 · Lesson 4
The ratio decides, not the amount.
Chemistry · Chapter 5 · Lesson 5
Why the calculated answer is never quite what you get.
Chemistry · Chapter 6 · Lesson 4
Volumes count particles, if the conditions match.
Honors Chemistry · Chapter 1 · Lesson 1
Significant figures are an approximation to something exact.
Honors Chemistry · Chapter 1 · Lesson 2
A conversion factor is a way of writing one.
Honors Chemistry · Chapter 1 · Lesson 4
Concentration times volume is a number of moles.