As I work on developing a method to assess how successful smartboards have been for the students of SLP, I have been reading up on Marzano's research. Here are some interesting links I've found about his research:
The Man Himself: Research reports from Marzano's research laboratory.
Review by Jonathan Martin: Looks at the various components of Marzano's research.
Article about research: This article does a nice job of summarizing the findings of Marzano's research.