HOW TO USE A CONCENTRATION
CHART:
Always use a metronome set at a comfortable, but challenging
speed. For the first runthrough simply recite each number with a
variable set for the entire chart. (i.e. subtract "2" from
each number  the first line reading " 11 23 40
15
6 28 " and so on.) Once that can be done
smoothly at a respectable tempo, move the gradient of difficulty up a
notch or two. Read the chart in reverse (beginning at the bottom
right) and/or make each cell alternate between "+2" and
"2", or any number you wish. (in this case, the first line
reading " 15 23 44 15 10
28 "). Then try reciting a color (instead of the number) on
all squares bearing the number "5". After this, difficulty can be raised yet again by
overlapping a condition to, for instance, only the ODD numbers. (a
condition being perhaps a finger snap or a clap on the odd number only)
Now that you have an understanding of how this works, you can tailor
charts like this to your own needs.
