In python:
year = int(input("Enter the school year: "))
if 0 <= year <= 5:
print("Elementary school")
elif 6 <= year <= 8:
print("Middle school")
elif 9 <= year <= 12:
print("High School")
elif 13 <= year <= 16:
print("College")
elif year >= 17:
print("Post-secondary")
else:
print("Invalid")
I hope this helps!