Congrats! I wrote this last year, but here it is again:
Questions for current students:
What do you like about living/studying/being here?
What would you say is the biggest weakness of the program?
What are the mentorship styles of the (or your) professor?
(Similar) are professors supportive of their students?
What are the classes like? Which was your favorite? Your least favorite?
What is the funding situation like? (if PhD)
Is the department stable?
Are there opportunities for one to get assistantships or other funding? (EdS)
Can you live relatively comfortably on your stipend?
What is the cost of living like here?
Do I need a car?
Where is a good place to live/where do other students live/where are the bad neighborhoods?
How long does it realistically take for people to complete this program? (more PhD)
Anything you want to know about internships.
Questions for professors (mostly PhD related, sorry! Maybe some overlap...)
Can you describe your current or future research/grant proposals to me? You should have looked this up already, but by the time professors publish their work several years have passed and those interests/studies are outdated.
How long do students typically take to finish the program (you can usually see the statistics online)? If I am motivated can I take only x (time they say can be completed in) years. (E.g. "I know that the average for this program is 6, but you outline a 5-year plan. If I am motivated, is it realistic for me to think that I can graduate in 5 years?)
What is your mentorship style (so important!!!)
Does your program generally train students to enter academia or field positions or both? (PhD question)
What kind of internships have your students recently completed?
What are your former students doing now?
Is it realistic for me to hope to get a paid internship placement? Which locations are common?
What is your rate of students who have paid internship placements (again, this can usually be found online).
What do you expect from students in each year of their degree?
What is your focus when it comes to academic courses/classroom learning?
What professional affiliations do you expect your students to have? APA, NASP, state-level organizations, etc.
Do students have the opportunity to publish and/or present their work at academic conferences?