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Since the adoption of the Next Generation Science Standards for California Public Schools, Kindergarten through Grade Twelve (CA NGSS)the California Department of Education has been developing a new science assessment based on the CA NGSS. The statewide California Assessment of Student Performance and Progress (CAASPP) System includes federally required science assessments in grades five and eight and once in high school (i.e., grade ten, eleven, or twelve). This science assessment is the new California Science Test (CAST), which is based on the CA NGSS.
In 2017, all eligible students in grades 5 and 8 took the CAST pilot test for the first time.  In 2018, all eligible students in grades 5 and 8 took the CAST field test.  After a 2-year hiatus due to the COVID-19 pandemic, the state of California Department of Education mandated that administration of the CAST assessment resume in the spring of 2022. 
For more information regarding the CAST test and practice questions, please follow the links below.
California Department of Education (2018). California Science Test. Retrieved from https://www.cde.ca.gov/ta/tg/ca/caasppscience.asp