This document defines vocabulary terms related to geometry and measurement for 3rd grade math students. It includes definitions for terms like length, width, increase, decrease, greatest, least, sides, angle, right angle, perimeter, and units of measurement such as inches, feet, yards, meters, and degrees. Measurement tools like rulers, yardsticks, tape measures, and thermometers are also defined. Time notation terms a.m. and p.m. are explained along with money notation like pennies and nickels. Degrees are defined as a unit of measurement for both temperature and angles. Fahrenheit and Celsius scales for temperature measurement are also included.