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AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
April 1, 2024
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1 ene 2009 año - The Common Core State Standards Initiative, "a state-led effort coordinated by the National Governors Association Center for Best Practices (NGA Center) and the Council of Chief State School Officers," is launched.
Añadido al timeline:
14 oct 2017
0
0
408
1998-2017
fecha:
1 ene 2009 año
Ahora mismo
~ 15 years ago