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.
Math = Love: Parts of a Radical Graphic Organizer for Interactive Notebooks Chapter
YBC 7289, a Babylonian clay tablet, ca. 1800-1600 BC, notable for containing an accurate sexagesimal approximation to the square root of 2, the length of the diagonal of a unit square. (Yale Babylonian Collection)