3) How does current education practice apply both 21st Century Learning Skills and Core Knowledge?

The 21st century learning skills provides a foundation for each specific learning area and where the child needs to be in order to be able to learn. Core knowledge does something similar. Currently working in a Special Education class I believe my IEPs for each student uses both of these practices by laying a foundation for each student, assessing where they are at currently and then building on their declarative knowledge to achieve a maximum learning environment.