Losing concentration in school for several years?

[tntenigma]

I started losing concentration in school work in the last year of high school, and this continued into college. I'm now in second year of college and recently failed a class because I'm unable to concentrate. I have no past medical conditions, but I feel this may be one. Is this normal, given that I've been like this for nearly three years?

[Sandman2]

   Good point by jdtm.  If it was something like ADD, you would have noticed it much earlier.   I guess the other question would be if this effects you in all classes or only those at a certain time of the day (or only really boring classes?)?

[jdtm]

Having difficulty with concentration in school can be one of the symptoms of anxiety.  Could this be a possiblity?  Just wondering ....