To sign learn, hold your non-dominant palm up, then take your open dominant hand and spread your curved fingers on your other palm. Next, pull your dominant hand up such that your fingers close into a flat O hand as you touch them to your forehead.
It is as if you are gesticulating the invisible knowledge or ideas that are transferring from a book or tablet to your brain.
Teach your toddler the learn sign when they are ready for this concept and they have begun rudimentary preschool classes for Math, Spelling, and Reading.
This is a useful flash card taught best in conjunction with other learning or study-centered signs.