With this activity, students can practice identifying, building (with counters), and writing the numbers 0-9, then figure out if the numbers are even or odd. Step 1: Write the number. Step 2: Build the number with counters. Step 3: After figuring out if the counters can be divided equally, write "odd" or "even". I like to set out large brass house numbers that the students can pick up and place above the counters they are using. They love this!