Leitner 504 Essential Words

In the name of Allah

One of the most important tests of English vocabulary learning English and 504 words is necessary and useful.

short-term memory deposit ... with a man named Sebastian Leitner Austrian research review procedure can be repeated at certain times put these words into long-term memory, never to be forgotten ...

This application, in addition to the 42 lessons 504, Leitner System and also provides the words to mind once and for all.