There is no point even sitting her at the computer without her medication, but even on it BigBrainz (which we otherwise love, for similar reasons to you) is just too fast. To be honest I am not sure even I could pass the final retention for multiplication. I never tried on my own without distractions, I've only tried typing my DDs verbal answers and we never got through it, which was a pretty bitter end for her, getting through all levels but never "finishing" the game. Clearly we are not fast people. Possibly my only problem is not being that proficient at the number keypad. But I tend to get stressed by the time pressure as well (I think possibly I should just turn the terrible sound effects and stressy music off), which is ironic because I have never been stressed by tests or exams, nor generally had trouble completing them in time (usually quite the contrary).