Learning goals: Teacher Facing Describe (orally and in writing) how exponent rules extend to expressions involving negative exponents. Describe patterns in repeated multiplication and division with 10 and $\frac{1}{10}$, and justify (orally and in writing) that $10^{\text-n}=\frac{1}{10^n}$. Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from 8.7 Exponents and Scientific Notation, Grade 8.