This math chapter workbook on "Counting by 2s and 5s" introduces the concept of skip counting to help develop students' understanding of number patterns and sequences. For counting by 2s, teachers can use pairs of objects, such as socks or shoes, to help children visualize the grouping of twos and practice skip counting up to at least 20. For counting by 5s, teachers can incorporate counting effective use of handprints or counting by fives on a number line and encourage students to recite and recognize number patterns. By counting by 5s up to 50, teachers can introduce some of these larger numbers to young kindergarteners.