Perhaps you've already gone the healthy-diet route? Eliminated junk food, increased the fruit and vegetable intake... yet the child's concentration span is shorter than an eye blink? Ask yourself the following:
- does the child seem to concentrate better when chewing?
- is the child more sluggish after lunch?
- does he/she have an intolerance to salicylates which occur naturally in even wholesome food?
The first two points can be checked easily using the Learning Style Assessment tool.
To find out more about learning styles, have a look at this excellent video featuring Barbara Prashnig.