One of my favorite types of "worksheets" is the foldable, because students glue it directly into their math journals, instead of asking "Do we need to keep this?" at the end of the lesson. Fellow teachers, you know what I'm talking about.
This foldable is a great practice resource for lessons on estimating square roots. The first page covers the logical process of determining the approximate value of a square root and allows students to use calculators to square their approximations and get closer and closer to the correct answer. Alternatively, this page can be done without the use of calculators for more advanced students. Pages 2 and 3 are no-calculator zones, where students will estimate each square root to the nearest tenth, checking their approximations by hand and adjusting estimates as necessary. Page 3 also includes perfect squares to give students a chance to recognize when approximations are not necessary.