This file contains 40 different subject pronoun cards, which may be cut apart for a variety of activities.
I use these in sorting activities, to help students identify compound subject pronouns (ella y yo, tú y Ud., etc.) during the early part of the school year.
Later in the year, I keep a set of these laminated cards at my desk, and pull a card off the top of the pile to quickly come up with a subject. This keeps me from defaulting to simple subjects (like "yo", or "nosotros") and keeps students in the habit of identifying compound subjects.