Final answer:
It is likely that Blanche taught drama or theater arts at Laurel High School, given the context of teaching Shakespeare and performance highlighted in the reference material provided.
Step-by-step explanation:
The information provided does not specify the exact subject that Blanche taught at Laurel High School.
However, based on the provided reference to Laura, who has an extensive background in teaching Shakespeare and performance, and has been actively involved in theater education at various levels, it is reasonable to deduce that Blanche could be a teacher with a similar focus in the arts, specifically in drama or theater arts.
Laura's experience ranges from teaching pre-kindergarten children to college students and even mentoring women artists.
Her involvement with education programs and consultation for incorporating language and plays, particularly those of Shakespeare, into the creative work of businesses and institutions, suggests a deep engagement with the performing arts in an educational setting.