Play this 2 wonderful games about the Spanish Explorers of the Modern Age and the Roman Empire from the Ancient History.

http://www.educa2.madrid.org/cms_tools/files/311446b7-f0ed-4d17-a489-9e7f2f28cef8/index.html
http://www.educa2.madrid.org/cms_tools/files/cbce8d52-8086-483e-bbcb-a151decdef7b/index.html

Once upon a time: man

I would recommend you to see these videos to learn more about the periods of history.
Start to see them from the beginning, from chapter 1.

http://www.antena3.com/videos/series-infantiles/erase-una-vez-el-hombre.html