More than a third of teachers are projected to retire by 2023-24 in 20 mostly smalll counties.
The project aims to build students' language skills in all classes.
California teachers say they're not getting enough quality training and materials.
New law is intended to ensure all qualified students proceed to advanced math.
WestEd's questionnaire asks what they've done and what they need.
Ten California districts are participating in an early implementation initiative.
Positive school climate boosts student achievement test scores in California, research study from WestEd says.