Write subject matter appropriate to rap themes. While there are no rules regarding content of a rap poem, preserve the authenticity of your rap poetry by writing about urban topics, whether positive or negative, and social or political issues. Steer clear of inappropriate topics when you use rap structure to teach poetry to children.
Write with a set musical rhythm and rhyme scheme. According to author Bruce Lansky, a good way to count rap rhythm is "a ONE and a TWO and a THREE and a FOUR" structure, with the emphasis falling on the capitalized words. When reading a rap poem, the capitalized word represent the stressed syllables of a rap poem.
Rhyme as often as you can, primarily on the end words, although internal rhymes work well in a rap poem as well. Here's and example of end line rhymes:
I be-LIEVE in LOVE and we KNOW it's TRUE
There's a GIRL for me and a GUY for YOU.
Continue this rhyme scheme throughout your stanza (usually four to eight lines long), with the end word of each line rhyming. This example contains an internal rhyme as well, in the first line. The words "no" and "dough" rhyme.