I realize it’s just a little sign for a basketball tournament. But, is it really unreasonable to expect a sign that is hung within a school to contain the correct spelling of such an important word? I certainly don’t advocate reliance upon word processor program spell checkers, but at least they will alert you that you have misspelled the word ‘sportsmanship’!

Of course there is also the issue of the period, the use of the word so, and the second sentence.