This is a fantastic all-encompassing rubric to assess acting in a drama class. The rubric is on a 5 point scale, and assesses five categories: movement, character, blocking, voice, and facial expression.
The document includes two pages: one for a pre-assessment, and one for the final assessment. It is in document form so you can edit and change as you see fit.
I use this with my drama students at the beginning of the course and the end in order to show student growth. Once you become familiar