colleges have received greater scrutiny from the US government, state Attorneys General, the media, and scholars. Notable business failures include Corinthian Colleges (2015), ITT Educational Services (2016), Education Management Corporation also known as EDMC (2017), and Education Corporation of America (2018). Two large schools, Kaplan University and Ashford University were sold to public universities with for-profit online program managers and rebranded as Purdue University Global and University of Arizona Global Campus. Engineering Teaching engineering is teaching the application of scientific, economic, social, and practical knowledge in order to design, build, maintain, and improve structures, machines, devices, systems, materials and processes. It may encompass using insights to conceive, model and scale an appropriate solution to a problem or objective. The discipline of engineering is extremely broad, and encompasses a range of more specialized fields of engineering, each with a more specific emphasis on particular areas of technology and types of application. Engineering disciplines include aerospace, biological, civil, chemical, computer, electrical, industrial and mechanical. Performing arts The performing arts differ from the plastic arts or visual arts, insofar as the former uses the artist's own body, face and presence as a medium; the latter uses materials such as clay, metal or paint, which can be molded or transformed to create a work of art. Performing arts institutions include circus schools, dance schools, drama schools and music schools. Plastic or visual arts The plastic arts or visual arts are a class of art forms, that involve the use of materials, that can be moulded or modulated in some way, often in three dimensions. Examples are painting, sculpture, and drawing. Higher educational institutions in these arts include film schools and art schools. Vocational Higher vocational education and training takes place at the non-university tertiary level. Such education combines teaching of both practical skills and theoretical expertise. Higher education differs from other forms of post-secondary education such as that offered by institutions of vocational education, which are more colloquially known as trade schools. Higher vocational education might be contrasted with education in a usually broader scientific field, which might concentrate on theory and abstract conceptual knowledge. Professional higher education This describes a distinct form of higher education that offers a particularly intense integration with the world of work in all its aspects (including teaching, learning, research and governance) and at all levels of the overarching Qualifications Framework of the European Higher Education Area. Its function