English Language Arts Common Core Standards K-12 Common Core standards are a set of academic expectations for Math and English Language Arts. The framework outlines what a student should knowby the end of each grade in a school year. It was created in response to supporting students so they could gain the skills they need to succeed in college or in the workforce. Common Core was also created to standardized education in the United States so that no matter which state the student lives in, they are getting a strong and similar education as a student in another state.
The movement to this national education reform started in the 1990s but it took two decades to create and implement. The transition to Common Core started around 2010 and the framework was initially adopted by 43/50 states. Now, some states (4) have opted out or solely adopted one content area rather than both.
Adopted in 2012, the California ELD standards are meant to work in tandem with the ELA standards. The standards were developed to support English language learner students to build English proficiency, refine academic use of English and provide students access to subject area content.
Here's a video that explains the CA ELD Standards well.
The Three Premises of the CA ELD Standards are: Interact in Meaningful Ways Understand How English Works Use English Purposefully