Should I take the TOEFL iBT again?

[potla]

So the results for the TOEFL iBT just came in and I have got a 25/30 in the speaking section. The rest of the sections are very good (114 total) but I am worried about the cutoff for the speaking section for Teaching Assistant appointments. FYI, I am not from a country whose native language is English, and I am applying for math graduate school.

I'll be applying to the top 5 schools, along with many others spread in the top 20. Berkeley, Princeton, Harvard explicitly mention that a score of 26 (27 for Princeton) is needed for TA appointments. Do you guys think that I should retake the test, or would a 25 be fine for applications? Just to be clear, I have no problem with giving an oral English test when I reach the university. I am just worried that they might not want to take me because of the low funding opportunities if TA appointments are excluded