This Learn Teach ambigram is a nice short asymmetric ambigram (also known as a symbiotogram) that is a nice example of an engineered optical illusion at work.
Take a look to the left, and you will see that you can read this as 'Learn' when the design is upright and as 'Teach' when the design is inverted.
To rotate the design, just move your mouse over the image.
By the way, every product in the FlipScript store has already been personalized with this ambigram! You just need to navigate to a category using the red menu bar above and your Learn Teach ambigram will magically appear!