If a picture's worth a thousand words, why don't we teach visual literacy?
Interestingly (at least to me), while the term "visual literacy" is credited to Jack Debes, co-founder of the International Visual Literacy Association around 1969, it did not come across my radar as a school psychologist and educator until very recently. Similarly, while Mary Alice White, a researcher at Columbia University's Teacher's College has found that kids learn more than half of what they know from visually presented mediums, few schools consciously teach students how to evaluate and think critically about visual data. In fact, until VERY recently, there was little or no emphasis on visual literacy.
For strategies, websites and books to help you and your child develop visual literacy skills please come to my blog for specific details: http://departingthetext.blogspot.com