Practice writing the number one this is fun with this interactive worksheet. Have students rainbow write, or color in the number one; both the word and the numeral. Count one toy. Fill out the ten frame with a dot, stamp, or sticker to represent one. Teach children the fun chant to remember how to write the number one. Use the four square box to tally, draw, and show one more, and one less than one. Show students what the number one looks like on a rekenrek before practicing writing the word one and the numeral one.