Researchers at Princeton have found evidence that making something more difficult to learn improves long-term learning and information retention. More specifically, changing the typeface from something legible (like Helvetica) to something more difficult to read (like Monotype Corsiva or Comic Sans) increased retention in actual classroom settings.

This study demonstrated that student retention of material across a wide range of subjects (science and humanities classes) and difficulty levels (regular, Honors and Advanced Placement) can be significantly improved in naturalistic settings by presenting reading material in a format that is slightly harder to read…. The potential for improving educational practices through cognitive interventions is immense. If a simple change of font can significantly increase student performance, one can only imagine the number of beneficial cognitive interventions waiting to be discovered. Fluency demonstrates how we have the potential to make big improvements in the performance of our students and education system as a whole.

I agree with Lehrer…get David Carson on the horn. (thx, lara)