Cinquain

A cinquain is a five line poem with a specific structure requiring learners to identify or to use nouns, adjectives and verbs.  It may also require them to break words down into syllables.

http://www.nps.gov/akso/parkwise/Students/ReferenceLibrary/KEFJ/Living_in_Kenai/3_HO1.pdf

There's also some very useful stuff at this blog about diamante poems and other syllable counting forms.
http://sparkleteaching.blogspot.com/2011/05/syllable-and-word-count-poem-diamante.html#comment-form

Don't try to do too many types of syllable counting poetry - it will lead to learners becoming confused about which form is which.  Allow them to become confident in one form before introducing another and always build on what they already know.