A PowerPoint detailing the history of the Iberian Peninsula from Ice-Age until the Roman Invasion. There are 36 slides and links to outside resources.
I split up the slides at:
#13 for the first day
#26 for the second day
and finish the third
Students learn all about this large chunk of history and get an idea of how it relates to the other classes they've taken.
This PowerPoint takes up 3 days of class time during which students are instructed to take notes on the six major civilizations (Iberian, Greek, Phoenician, Celt, Tartessian, and Basque) in t-chart style.
What you choose to do from there is obviously up to you, but I have them make a timeline in relative chronological order by assigning certain parts of the history and having them illustrate it using what they have learned during the lesson.