Robuta

https://www.umu.se/en/student/syllabus/6pe168/

Syllabus, Chemistry education 2 for upper secondary level, 2014-12-29 and until further notice

upper secondary level chemistry education syllabus

https://www.scielo.org.mx/scielo.php?script=sci_abstract&pid=S0186-72102016000300663&lng=en&nrm=iso

Labor conditions of urban students and school dropout at the upper secondary level in Mexico

school dropout labor conditions urban students