I also teach Brit Lit. I begin with a historical study over the Anglo-Saxon period. After, I move into Beowulf. (Prior, I explain the kenning and students tend to love these metaphorical puzzles.) Sometimes I teach the lament and elegy poems prior to the unit ("The Seafarer," "The Wife's Lament," and "The Wanderer").
After the Anglo period, I move into the Medieval Period. Again, I give a historical overview over the period. (On a side note, these historical mini-lessons are important given they explain the background, characteristics and beliefs of the people of the period.) Once the historical background on the Medieval Period is completed, I teach Sir Gawain and the Green Knight. I heavily cover chivalry and the ideology behind the pentangle (students even create pentangles based upon Gawain's).
After the Medieval Period, I teach Chaucer (again, preteaching the historical period). The Prelude is the first thing taught. After, I typically teach The Pardoner's Tale, The Wife of Bath, and The Knight's Tale.
Lastly, I teach Frankenstein.