During my first fundamentals class with collage freshman we would explore the stage using this list of terms.

 

1   Center line
2   Plaster line
3   Proscenium arch
4   Arena
5   Thrust
6   Apron
7   Downstage
8   Upstage
9   Stage right
10   Center stage
11   Stage left
12   Offstage
13   On stage
14   Best seat in the house
15   Worst seat in the house
16   Sightlines
17   Orchestra pit
18   Stage floor
19   Show deck
20   Main curtain
21   Pipe batten
22   Battens
23   Arbor
24   Lift lines
25   Weights
26   Guide rails
27   Operating line
28   Rope lock
29   Wings
30   Masking
31   Border
32   Leg
33   Backdrop
34   Grommet
35   Webbing
36   Side hem
37   Pipe pocket
38   Pin rail
39   Sandbag
40   Grid
41   Loft block
42   Head block
43   Tension block
44   Traps
45   Trap room