source source like hyperactivity, inattention and impulsivity http://ldaamerica.org/types-of-learning-disabilities/adhd/ source Learning Disabilities Association of America Learning Disabilities Association of America http://ldaamerica.org/types-of-learning-disabilities/adhd/ ADHD ADHD ADHD source 30 – 50 percent of children ADHD Attention Deficit Hyperactivity Disorder (ADHD) ADHD http://ldaamerica.org/types-of-learning-disabilities/adhd/ Learning Disability Association of America ADHD http://ldaamerica.org/types-of-learning-disabilities/adhd/ Learning Disabilities Association of America source http://ldaamerica.org/types-of-learning-disabilities/adhd/