Major concepts and a history of time-keeping can be found at the NIST site.
Free Pre-K-12 lesson plans, activities, and resources
Free Pre-K-12 lesson plans, activities, and resources
Major concepts and a history of time-keeping can be found at the NIST site.
Attributes: none set
Resource Link: https://www.nist.gov/pml/productsservices/general-interest