my first grader is not following teachers direction, if he's having a hard time with school work,example like math with coloring, he refuses to finish it,and sometimes so slow to do it, sometimes when teachers tell something to do,he can repeat exactly how the teachers said it but doesnt do it in action, he just sit quietly. Sometimes when teachers talking, he doesnt pay attention, when reading a book, he can read it well but less understand the story. when theyre doing some center activity, he needs a lot of hwlp from the teacher, but in other kids,they can do it by themselves,while doin homeqork at home, he can do and finish it but will take time,coz he'll stop writing and play with the pens or eraser, then if i remind him,he'll do it and after minutes, he'll be like that again,he listen and follow my direction, sometimes i need to say it over again, but he'll do it. do you think my son has adhd? or any behavior problem?