Does `PROGRAM TYPE` stand in for 'PROGRAM TYPE? ' (Data Cleaning With R 5/12)

Screen Link:

My Code:
class_size <- class_size >
filter(GRADE == “09-12” & ‘PROGRAM TYPE’ == “GEN ED”)
Replace this line with your code

What I expected to happen:

What actually happened:
Error message shoed up.

Replace this line with the output/error

In my computer, there are no quotations except for " or ‘’. how can I handle the situation?