Measuring with Mr Wiggle Math Grade 1 Author:Marsha Elyn Wright This book is one in a series of books designed to develop children's mathematical thinking. Each book supports the use of Mr. Wiggle Counters in activities that teach key mathematical concepts. In Measuring with Mr. Wiggle, grade 1, children use the counters to: understand and use vocabulary related to measurement; recognize the attributes of le... more »ngth, weight, and perimeter; estimate measurements; compare lengths and weights using words like longer/shorter, longest/shortest, and heavier/lighter; measure length, weight, and perimeter using nonstandard units; compare and order objects to find relationships; develop referents for units of measure.« less