I like the cards because they are blank on one side and have lines on the other side. In this sense they are practical and efficient. They are also brightly colored.
I purchased the cards to use in group polling during a presentation. The bright colors made them visible. The very best part was that I had planned to use a paper cutter to cut brightly colored cardboard to use and buying index cards meant that I didn't have to do that. The extras can be used for other applications
I go through a great deal of these every year. My students use them for everything from flashcards to research presentations and personal information that they write out at the beginning of the school year. I also use them so that my students have every opportunity to pass the classes that they are currently in and hope that they will continue to use the technics that I have taught them to continue on their educational paths wherever it may take them in the future. They have the abilities to be good students throughout their lives.