And if not, what does that mean for how we teach them?
Can anyone point me towards recent research into the efficacy (or lack thereof) of 4Cs pedagogy? The 4Cs (so-called Communication, Collaboration, Creative and Critical Thinking skills) are also referred to as 'future-focused' or '21st century' skills.
The research on language learning could offer helpful examples here since the order of acquisition of grammatical features has been well documented in many cases. The lesson from that research is that the order is often unintuitive. It’s less often simple to complex or regular to irregular than it is frequent to infrequent. Interested to see the research emerge in other areas.