I know I’m not very intelligent but my teachers are so e _ _ _ _ _ _ _ _ _ _ and they always tell me I can do well.

I know I’m not very intelligent but my teachers are so embarassing and they always tell me I can do well.

Не совсем уверен, но может и подходит

I know I’m not very intelligent but my teachers are so encouraging_ _ _ _ _ _ _ _ _ _ and they always tell me I can do well.