California English Language Development Tests (CELDT) – CELDT is a test that students in kindergarten through grade twelve whose home language in not English are required by law to be assessed in English Language Proficiency. In California, the English Language Proficiency assessment is the CELDT. Beginning in the 2017-18 school year this will be transitioning to the English Language Proficiency Assessment for California.
English Language Proficiency Assessments for California (ELPAC) – ELPAC is a new assessment of English language proficiency for English learner (EL) students.
The following is from the California Department of Education.
State and federal law require that local educational agencies administer a state test of English language proficiency (ELP) to eligible students in kindergarten through grade twelve. The California Department of Education (CDE) is transitioning from the CELDT to the ELPAC as the state ELP assessment by 2018. The ELPAC will be aligned with the 2012 California English Language Development Standards. It will be comprised of two separate ELP assessments: one for the initial identification of students as English learners (ELs), and a second for the annual summative assessment to measure a student’s progress in learning English and to identify the student's level of ELP.
You can also visit www.elpac.org