[27: Strengthening teaching in Europe, New evidence from teachers compiled by Eurydice and CRELL, (Die Stärkung der Lehre in Europa, Neue Erkenntnisse von Lehrkräften, zusammengestellt von Eurydice und Crell), Juni 2015 http://ec.europa.eu/dgs/education_culture/repository/education/library/policy/teaching-profession-practices_en.pdf.
[27: Strengthening teaching in Europe, New evidence from teachers compiled by Eurydice and CRELL, June 2015 http://ec.europa.eu/dgs/education_culture/repository/education/library/policy/teaching-profession-practices_en.pdf][28: Supporting teachers and school leaders for excellent teaching and learning, part of the COM Communication on School Development and excellent teaching for a great start in life (COM(2017) 248).]