Six short practice pages build the odd-and-even-numbers concept through tracing, circling, and sorting tasks. Students first trace a printed row of even numbers (2 through 20) and then a row of odd numbers (1 through 19), reinforcing numeral formation alongside the odd/even label. Two follow-up pages present a 1-20 number grid and ask students to circle only the odd numbers on one page and only the even numbers on the other. A final pair of pages shows groups of dots that students must label as 'Odd' or 'Even' by writing the word underneath, moving the skill from tracing numerals to classifying quantities.