The Focus Formula is a great place to start to provide key nutrients to support improved focus and concentration. The B vitamin family is very important as are the blend of phospholipids such as Phosphatidyl choline and Phosphatidyl serine. These are vital to lipid membranes of the brain and neurological system. The formula also contains DMAE, a compound that has been found to be particularly useful for enhancing focus.
The Brain Pep formula may also be helpful but I would start them one at a time (i.e. try the Focus Formula for about 2 weeks, then add in the Brain Pep formula if desired results have not been reached). Also, be aware that the Brain Pep formula does contain some caffeine so be careful to look out for any unwanted side effects like racing heart, urinary frequency or difficulty sleeping at night.
Other vital nutrients for proper focus and concentration are Omega 3 fatty acids from fish oil. I highly recommend you make this part of his daily supplement regimen. In addition, it is important to focus on the right nutrition. Giving protein rich meals helps to stabilize blood sugars during the day which is crucial to brain function. The Focus Formula has a small amount of chromium in it which is very helpful for maintaining blood sugar balance throughout the day.