My DD-12 is ADD-inattentive. We've know officially since 4th grade; however, the signs were there since she was in 1st grade. We discussed this with our pediatrician who sent us to the Children's Hospital Hyperactivity and Learning Disabilities Clinic for evaluation. Basically, there is no official test for ADD; however, you really want to rule out that there are any learning disabilities, which will cause the same type of symptoms.
DD was diagnosed with mild ADD of the inattentive type. We were counseled by Children's Hosp. that we could either go to couseling and learn behavior modification techniques and to work with the school on placing her in the classroom where she would focus better (we tried THAT already), or we could try low doses of medication. The counselors at Children's told me that, while many parents really hesitate to use meds, they see the best response with that. So, we tried the meds and within one week she was like a new kid. Grades came up by the end of the year, self esteem came up etc.
We then tried to give her a *holiday* from the meds in the 6th grade. My DD felt that she was "over it" and could do fine without the meds. We did that most of 6th grade (where she got so-so grades) and then in 7th grade. Well, she fell apart in 7th grade. She was constantly misinterpreting assignments, getting them wrong, not getting them at all, not participating in class, the teacher said she didn't seem like she was there. She seemed stressed in class and unconfident. She was also forgetting books, assignments--really SIMPLE stuff. She got so many homework demerits that she had to serve 2 detentions. Not pretty. So, back on her medicine she went. One month later I had a teacher conference and the teacher was just amazed. She said to me: "If you ever had any doubts or fears about using the medication, please know you did the right thing. Your daughter has made such a turnaround and she is interacting in class extremely well, she looks and feels confident about her performance, and she is really a very focused, good student." The teacher was amazed herself and said she never saw such a good response. This, all for mild-inattentive ADD!!! So, yes, the meds help VERY much with this. My DD has NEVER been a behavior problem and off the medication she is still very well-behaved and most adults think she is wonderful to have around.
So, please do get an evaluation. If you suspect there is a problem you are probably right. And with each grade your DD goes up, it gets worse because the style of teaching gets less "entertaining" and the responsibilities and requirements for organization keep increasing.