A post-graduate student is working on assessing the effect of the syllabus in the high school where she works, as an English teacher. She believes that, in addition to the linguistic development of her students, the goals of the school curriculum may additionally be reflected in the acquisition of "21st-century skills".
These are defined as: critical thinking, collaboration, meta-cognitive skills, problem-solving skills, and so on.
Specifically, how can progress in these specific skills be measured? Is there a rubric which is used for this purpose? Links, recommendations for published articles on this specific topic would be welcome.