White easgle,

I just read about this Concentration Exercise and it may help you.

It is called 'Word Skipping"
Say a poem or any passage in a book,
First say the whole passage then skip ever other word.

Ex. Jack and Jill went up the hill....
R1 Jack Jill Up Hill fetch pail water...
R2 Jack Up fetch water.

You can do this with ABCs, numbers, etc. and do as many rus as you want.

I hope this helps you.