There are study techniques that really improve memory. I don't quite understand what you mean by short term memory. Even the people that appear to glance at a word, and know it the next day use techniques to do so. And some superbright people can literally do just that.
I think the main question is why post to an ADHD forum. If he has trouble memorizing because he can't concentrate (ADD/ADHD), that is very different than just having trouble memorizing. Although the techniques will work for both. Its just a lot more difficult and time consuming for the ADD/ADHD child. There is no magical diet that will help. A good nutritional diet is always important.
So essentially, I need more information so that I can help you. Do you suspect ADHD? What subject is he having trouble in? Has he always had this problem? Does he think the teacher is a jerk? Depending on what is going on I have some books, that I can recommend.
This site complies with the HONcode standard for trustworthy health information.
The Content on this Site is presented in a summary fashion, and is intended to be used for educational and entertainment purposes only. It is not intended to be and should not be interpreted as medical advice or a diagnosis of any health or fitness problem, condition or disease; or a recommendation for a specific test, doctor, care provider, procedure, treatment plan, product, or course of action. Med Help International, Inc. is not a medical or healthcare provider and your use of this Site does not create a doctor / patient relationship. We disclaim all responsibility for the professional qualifications and licensing of, and services provided by, any physician or other health providers posting on or otherwise referred to on this Site and/or any Third Party Site. Never disregard the medical advice of your physician or health professional, or delay in seeking such advice, because of something you read on this Site. We offer this Site AS IS and without any warranties. By using this Site you agree to the following Terms and Conditions. If you think you may have a medical emergency, call your physician or 911 immediately.