Skills – necessity for education outcomes: Higher-order skills (“21st Century Skills”), such as the “4 C’s” of Creativity, Critical thinking, Communication, Collaboration, and others are essential for absorbing knowledge as well as for work performance. Yet the curriculum is already overburdened with content, which makes it much harder for students to acquire (and teachers to teach) skills via deep dives into projects. There is a reasonable global consensus on what the skills are, and how teaching methods via projects can affect skills acquisition, but there is little time available during the school year, given the overwhelming amount of content to be covered. There is also little in terms of teacher expertise in combining knowledge and skills in a coherent ensemble, with guiding materials, and assessments.