‘Sesame Street’ Adds ‘Elmo the Musical’ @ NYTimes.com.

…Each adventure — there will be 10 in rotation this year and 5 added next season — includes snappy original songs, a special musical cue to indicate that Elmo is using his imagination (and thus viewers should too) and math skills to learn, part of the show’s current focus on a curriculum of science, technology, engineering and math, popularly known as STEM. More educational activities will be online.

Using puppets/muppets to teach STEM.