Marisol Mercado- Estudios Sociales

http://www.educaplay.com/es/recursoseducativos/595128/13_colonias_de_los_ee_uu_.htm

http://www.connectpr.org/interactive-map

http://miaulacibernetica.blogspot.com/2012/03/asignaturas-comprension-medio-4-en-esta.html http://elgendarmedelahistoria.blogspot.com/

http://www.proyectosalonhogar.com/Salones/Historia/4-6/Indice5.htm

http://www.scribd.com/doc/37321591 " 

http://www.educared.org/global/calendario-civico-escolar/visor?EDUCARED_SHARED_CONTENT_ID=12776020

http://cultyciv.blogspot.com/

http://www.geocities.ws/bunnypr8221/VOCABULARIO.html

http://www.actiludis.com/?p=2289