Symptoms of inattention in children with attention deficit hyperactivity disorder include:

• Avoids tasks that require mental effort
• Difficulty concentrating during tasks or activities
• Difficulty organizing tasks
• Does not follow through on simple instructions
• Does not listen to what is being said
• Easily distracted
• Fails to finish tasks
• Makes careless mistakes
• Often forgetful
• Often loses things

Symptoms of hyperactivity include:

• Difficulty being quiet
• Extremely active in an environment where being calm is important
• Fidgeting with hands
• Squirming in a seat

Symptoms of impulsive behavior include:

• Blurts out answers before questions are completed
• Difficulty waiting in lines