1.I run a non profit with 3 others we are all volunteers.so I use these card to keep all the information for each family we help . keeps us organized. 2.What great size affordable 3. I also buy the color cards .I use a differnt color for each area.
These work out great for my son's English vocab list each week. He can put the nouns verbs and adjectives each on a different neon color. It helps with the memorization process. If every week he uses the neon green for adjectives and he knows the spelling and meaning of a word but forgets the part of speech he can visualize his flash card and remember the part of speech from the color of the card.