We the family use them as flash card notecards (as in reports/essays) bookmark notecards (for easy reminders in stories) easy to carry to do list cards. We love love them because they are as good as the more expensive brands and less expensive.
They are great for making study cards for vocabulary words for my young kids. The older boys are using them for speeches and note cards for presentations.
Index cards have been an essential for all five of my children. . from elementary school to college. They are convenient and effective for every subject. As a tool for preparing for tests and memorizing vocab and essay information they are convenient and the perfect tool for use now or reference for later.