The video (there's also a slideshow) provides a stunning and digestible visual of what exactly is going on during this complex process. It's online and it's completely free (see links above), and so could be a valuable resource for teaching about this aspect of gene regulation.
|Oh, the humanity. An Argonaute protein is guided by a small interfering RNA to where it will start rending a messenger RNA. From this great slideshow by Nature Reviews Genetics and Arkitek.|
Some RNAi reviews
Czech, B., & Hannon, G. (2010). Small RNA sorting: matchmaking for Argonautes Nature Reviews Genetics, 12 (1), 19-31 DOI: 10.1038/nrg2916
Moss, E. (2001). RNA interference: It's a small RNA world Current Biology, 11 (19) DOI: 10.1016/S0960-9822(01)00467-5
Woo, C., & Kingston, R. (2007). HOTAIR Lifts Noncoding RNAs to New Levels Cell, 129 (7), 1257-1259 DOI: 10.1016/j.cell.2007.06.014
Anton Wutz (2011). RNA-Mediated Silencing Mechanisms in Mammalian Cells Progress in Molecular Biology and Translational Science, 101, 351-376 DOI: 10.1016/B978-0-12-387685-0.00011-1
UPDATE: The Journal of Experimental Zoology B has an entire issue dedicated to "RNA in Developmental Evolution."