Problem: From the 1950s on, the students were also used for unpaid work at schools, where they cleaned and performed repairs. This practice has continued in the Russian Federation, where up to 21 days of the summer holidays is sometimes set aside for school works. By law, this is only allowed as part of specialized occupational training and with the students' and parents' permission, but those provisions are widely ignored. In 2012 there was an accident near city of Nalchik where a car killed several pupils cleaning up a highway shoulder during their "holiday work" as well as their teacher who was supervising them.
When were students used as workers?
The answer is the following: 1950s

Problem: Although Alexander Graham Bell is most often associated with the invention of the telephone, his interests were extremely varied. According to one of his biographers, Charlotte Gray, Bell's work ranged "unfettered across the scientific landscape" and he often went to bed voraciously reading the Encyclopdia Britannica, scouring it for new areas of interest. The range of Bell's inventive genius is represented only in part by the 18 patents granted in his name alone and the 12 he shared with his collaborators. These included 14 for the telephone and telegraph, four for the photophone, one for the phonograph, five for aerial vehicles, four for "hydroairplanes" and two for selenium cells. Bell's inventions spanned a wide range of interests and included a metal jacket to assist in breathing, the audiometer to detect minor hearing problems, a device to locate icebergs, investigations on how to separate salt from seawater, and work on finding alternative fuels.
What series of books does Gray say Bell would go to sleep reading?
The answer is the following: Encyclopdia Britannica

Problem: The implications are multiple as various research traditions are now[when?] heavily utilizing the lens of identity to examine phenomena.[citation needed] One implication of identity and of identity construction can be seen in occupational settings. This becomes increasing challenging in stigmatized jobs or "dirty work" (Hughes, 1951). Tracy and Trethewey (2005) state that "individuals gravitate toward and turn away from particular jobs depending in part, on the extent to which they validate a "preferred organizational self" (Tracy & Tretheway 2005, p. 169). Some jobs carry different stigmas or acclaims. In her analysis Tracy uses the example of correctional officers trying to shake the stigma of "glorified maids" (Tracy & Tretheway 2005). "The process by which people arrive at justifications of and values for various occupational choices." Among these are workplace satisfaction and overall quality of life (Tracy & Scott 2006, p. 33). People in these types of jobs are forced to find ways in order to create an identity they can live with. "Crafting a positive sense of self at work is more challenging when one's work is considered "dirty" by societal standards" (Tracy & Scott 2006, p. 7). "In other words, doing taint management is not just about allowing the employee to feel good in that job. "If employees must navigate discourses that question the viability of their work, and/ or experience obstacles in managing taint through transforming dirty work into a badge of honor, it is likely they will find blaming the client to be an efficacious route in affirming their identity" (Tracy & Scott 2006, p. 33).
What are people in stigmatized jobs forced to create?
The answer is the following: an identity they can live with

Problem: Purely electronic circuit elements soon replaced their mechanical and electromechanical equivalents, at the same time that digital calculation replaced analog. The engineer Tommy Flowers, working at the Post Office Research Station in London in the 1930s, began to explore the possible use of electronics for the telephone exchange. Experimental equipment that he built in 1934 went into operation 5 years later, converting a portion of the telephone exchange network into an electronic data processing system, using thousands of vacuum tubes. In the US, John Vincent Atanasoff and Clifford E. Berry of Iowa State University developed and tested the AtanasoffBerry Computer (ABC) in 1942, the first "automatic electronic digital computer". This design was also all-electronic and used about 300 vacuum tubes, with capacitors fixed in a mechanically rotating drum for memory.
The Atanasoff-Berry computer was invented in what year?
The answer is the following:
1942