June 2010: Common Core State Standards Initiative releases the final version of its standards for English language arts and math, an effort that took three years from conception to completion.
August 2010: California State Board of Education adopts the Common Core State Standards for math and English language arts. California is the 29th of 43 states to adopt the standards.
January 2013: State Board of Education modifies the math standards.
March 2013: State Board of Education modifies the English language arts standards.
November 2013: State Board of Education adopts a framework for math instruction, a tool that guides schools in developing curriculum and instruction.
January 2014: State Board of Education recommends 31 Common Core-aligned math textbook programs for use by K-12 schools. For the first time, schools may choose textbook materials from the list or conduct independent reviews of other materials.
March 2014: California receives federal permission to skip mandated state testing and reporting in English language arts and math so it can field test Common Core-aligned standardized tests from the Smarter Balanced Assessment Consortium. The tests are given to more than 3 million California students in the largest such field test ever conducted.
July 2014: State Board of Education adopts a framework for English language arts instruction, including a framework for English language development for English learners.
Fall 2014: California schools required to fully implement Common Core State Standards in math and English language arts. Many schools prepared for the change assigning teams of teachers to update lesson plans and repeatedly revising the plans to ensure maximum effectiveness.
Spring 2015: California students take their first official round of Common Core-aligned English Language arts and math standardized tests.