This activity can be used as a game or center activity for your ELA block. There are many ways to use the cards - from a simple match the capital letters to the lower case letters or increase the difficulty by turn the cards over and playing them as a memory match game.
They could also double as heading letters for a word wall. The last two pages are empty apples for your convenience.
I would recommend printing them off on card stock or similar paper and laminating them to prolong the life of the cards.