1 show words at random, so as to prevent you from having the fause reflection that your vocabulary has increased by leaps and bounds for no good reason.
2 Repeatly display words that have been already recited according to the lethe law of Cerebrum. So you can focus your energy in memorizing, no need to make a review plan beforehand.
3.It is not a practical strategy to allocate time evenly. One of the most important function of our software is to repeat those difficult words intensively.
4. We strive to establish your conditioned reflex toward words. Once we both achive our goals we can tell with confidence that good command of english has been already within yourself.