I was thinking of making lessons that involve more thinking into typing for example I would make a lesson with colors: red blue black green ... etc and I would color the word red with black, the word black with green, and have the user only type the real color the text display and not the text itself. Another lesson is to bring some images on the screen bird, dog, cat ... etc and either replace the head of each animal by the head of the other or number the images in different numbers and ask the typist to type the image either according to the head of the animal or either in order/reverse order of the numbering of the image. Of course there should be some time constraints/error constraints. Unfortunately I can not find a software that will allow me to do this, and I find more and more reason to write a new one to achieve what I want. What do you thin of the idea? Will it be beneficial in terms of learning and increasing the brain capacity to distinguish?