ask stp for tax questions

I'm working on H1B at a university. My income is exempted based on the tax treaty. However, I still pay tax for bank saving interest and gain from stock trading. Last year I also paid $3000 for my hu*****and's tuition (he is holding H4 and studying at our university). I'm filing 1040+8833. Do you think can I still claim education credit? Look forward to your answer. Thank you very much!