Cognates are words in two languages that share a similar meaning, spelling, and pronunciation. Thirty to forty percent of all words in English have a related word in Spanish. Here are a few helpful resources to help capatalize on Spanish-English cognates.
Cognates – a resource page with root words that are Spanish/English cognates
Cognados – a one-page mini-dictionary with Spanish/English cognates
http://www.colorincolorado.org/pdfs/articles/cognates.pdf – a link to a student-friendly cognate dictionary