Python is now the most popular introductory language at top U.S. universities
it seems that cs61a (UCBerkeley) still uses Scheme at some point
http://www-inst.eecs.berkeley.edu/~cs61a/su13/there is also cs61as which is entirely in scheme (but no lecture)
https://edge.edx.org/courses/UCBerkeleyX/CS61AS/2014_Spring/...