Learning goals: Teacher Facing Comprehend that $\text-\sqrt{a}$ represents the opposite of $\sqrt{a}$. Determine a solution to an equation of the form $x^2=a$ and represent the solution as a point on the number line. Identify the two whole number values that a square root is between and explain (orally) the reasoning. Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from 8.8 Pythagorean Theorem and Irrational Numbers, Grade 8.