Members of the 1,500-member West Contra Costa Unified School District teachers union and the 1,500-member Teamsters union are on strike, starting today. It’s the first strike in the district’s history. Both unions were offered 3% salary increases, which they rejected. WCCUSD teachers are among the lowest-paid in the region, their salaries ranking 18th out of the 19 school districts in Contra Costa County. There are also other issues of contention, including class sizes, high teacher turnover and