Overview from Everyday Mathematics "One of the most important topics in mathematics is the study of patterns. Since patterns are predictable, it is usually possible to state a rule that describes each pattern. This rule can then be used to extend the pattern. Much of Unit 3 focuses on number patterns: odd and even numbers; patterns in number lines and number grids; and number sequences. Number patterns will be revisited throughout the year. This unit continues to steady development of some important fist grade topics: Telling time is extended to times on the halfhour, dimes are added to children's existing collections of coins to be counted, and work is begun on solving simple addition and subtraction problems." Unit 3 has four main areas of focus:
