This presentation overviews: 
 
The importance of form-specific features
Distinctive qualities of drama
15 dramatic devices with simple definitions (aside, monologue, soliloquy, dramatic irony, set, breaking the fourth wall, props, lighitng, polyphonous script, stage directions, dialogue, proxemics, costume, staccato, suspension of disbelief)
4 extra terms: verisimilitude, catharsis and hamartia 
Follow-up lesson: check students' understanding with a competitive round of the Dramatic Features Cluey Find-a-Word. 
Extension Task (listed here only):
 
Using their play text, students work in groups to race to find as many of the 15 dramatic devices listed in this presention as possible. May make a Powerpoint or table in Google Docs to share examples with the class.