In the 1950s, with increasing pressure on the United States to stay ahead in the Cold War, homework made a resurgence, and children were encouraged to keep up with their Russian counterparts. From that time on, social attitudes have oscillated approximately on a 15-year cycle: homework was encouraged in the 1950s to mid-1960s; it was rejected from the mid-1960s until 1980; it was encouraged again from 1980 and the publication of "A Nation at Risk" until the mid-1990s, when the Cold War ended. At that time, American schools were overwhelmingly in favor of issuing some homework to students of all grade levels. Homework was less favored after the end of the Cold War.