This packet helps students practice a core number sense skill: counting by 2s. This packet focuses on counting by 2s, starting with odd numbers. The packet includes a range of problems, asking students to count by 2s, starting with a particular odd number. Each set asks students to count the next 10 even numbers. This packet helps students understand how to count by 2s, how to identify and generate odd numbers, and how to add with 2s. So, the packet is good for first grade students learning to count by 2s and add 2s.