i don't get when it says
create your own set of multiplication flash cards for all tables from two to twelve
A flash card has the problem on one side and the answer on the other. If the problem was 2* 5, that would be on one side, with the answer (10) on the other. To save the number of cards used, you could have two different problems on one card.
Let's say you had the two problems 2*5 and 3*6. One side would have 2*5 in large font and 18 in small font. The other would have 3*6 in large font and 10 in small font. That way, whichever side you looked at, you would have a problem presented.
I hope this clarifies the task.