Thanks for the message @jym5556 - I just want to follow up a bit on @andresrcs's post above -- without enough information, it is hard for us to identify what's going on. If I had to guess, the issue is with the way you are importing data into R.
When I have an excel file, I default to using the readxl package to read in my file nicely.
I'd be curious to see how the data looks like once you read it in, before you try any formatting steps. You can do this by str(footballdata_econ_485) or dplyr::glimpse(footballdata_econ_485). If the import was correct, you will see that you have a data frame of the same number of columns/rows as in your excel, school is of type "character" or "factor", and year and wins are of type numeric or integer.