Cinco de Mayo:

 Cinco de Mayo, From Mexican Fiesta to Popular U.S. Holiday (National Geographic)

Cinco de Mayo: NOT Mexico's Independence Day (Discovery News)

Three Kings Day/Dia de los Reyes Magos:

Three Kings' Day Celebration: History And Traditions Behind 'El Día De Los Reyes' (Huffington Post)

Day of the Dead/Día de los Muertos:

Dia de los Muertos: Lively Mexican holiday honors the dead (National Geographic)

The Mexican Day of the Dead (Learn NC)

Additional Suggestions:

• New York Times, using ProQuest. Choose ProQuest -- News & Issues -- New York Times (Username - sbrunswick Password - Ask your teacher or librarian.)

• http://www.nationalgeographic.com/

• http://news.discovery.com/

• https://www.washingtonpost.com/

• http://www.pbslearningmedia.org/

• ProQuest or NJ Elite 500. (Username - sbrunswick Password - Ask your teacher or librarian.)