When dealing with square roots students sometimes have a hard time understanding what the radical sign (the square root bar) represents. Using this visual could help struggling students grasp the concept. (Applicable for graders)
Estimating Square Roots - Interactive Notes and Worksheet (8.NS.2)
I've got a foldable for that!: Math Important Book - sequences and square roots I like the idea of using foldables to teach expectations. Interactive way to go over the "rules" at the beginning of the year.