Looking on the internet deeply has found these results:

the answer is on the back of the card is the most popular phrase on the web.

the answer is on the behind of the card 10 results on the web	the answer is on the back of the card 148 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
It doesn't look like this phrase is very popular! The search could not find any examples on the internet.	One advantage of flash cards over the war game is the answer is on the back of the card (I think, haven't used them). With the war game, someone has to know�... If the answer to the question is correct (the answer is on the back of the card), the participant wins that card and can take one additional turn. If the answer is not�... The answer is on the back of the card. (When preparing cards, ensure that the answer is printed upside down) Missed or incomplete answers are noted and�... Show students that the answer is on the back of the card. When playing the game , the student who answers first correctly gets to keep the card. The student with�...

the answer is on the behind of the card

10 results on the web

the answer is on the back of the card

148 results on the web

More popular!

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

One advantage of flash cards over the war game is the answer is on the back of the card (I think, haven't used them). With the war game, someone has to know�...
If the answer to the question is correct (the answer is on the back of the card), the participant wins that card and can take one additional turn. If the answer is not�...
The answer is on the back of the card. (When preparing cards, ensure that the answer is printed upside down) Missed or incomplete answers are noted and�...
Show students that the answer is on the back of the card. When playing the game , the student who answers first correctly gets to keep the card. The student with�...