Engish/Spanish flashcards

My wife is looking for flashcards to buy. She tried LCS, but you have to be taking their Spanish lessons.

You will learn much faster by purchasing blank cards and making your own flash cards. It forces you to look up words & phrases, check the translation and write them correctly on the cards; Spanish one side, your language on the other.
Using pre-printed cards causes you to use rote memory, which is short term only and not as effective a method.

my wife wants them. Some memorization is good for vocabulary.

There are electronic flash card programs available free on the internet. Anki is one of the best -- free download at http://ankisrs.net/ There is a wide selection of card sets with popularity ratings, at https://ankiweb.net/shared/decks/spanish
There are free versions of the program for windows, android and others, but one of them, for iphones I think, costs $25. You can use your own settings, but by default you get 20 new words a day plus review words/phrases/sentences. After you check your answer you get a selection of when you want to see the word again, for example, 1 minute, 10 minutes, 1 day, 3 days or more. The program calculates what choices it thinks you need.

Tell her to go to Duolingo.com it is free and they do flash cards, phrases etc. It is a pretty good program, best of all, FREE.