Contract demands issued by United Teachers Los Angeles include a 20% pay raise, smaller class sizes, and more funding for student mental-health services.
The district has said it needs to keep money in reserve for a rainy day, especially amid concerns over a possible recession.
Last week, thousands of LAUSD service workers overwhelmingly approved what has been described as a "historic" labor agreement.
Members of the Service Employees International Union Local 99 cast ballots on the proposed contract in-person and online from April 3-7. The agreement was reached March 24 following a strike that shuttered the nation's second-largest school district for three days.
That contract effectively met the union's demand for a 30% pay raise and also includes bonus payments, retroactive pay and fully paid health benefits.
UTLA joined the SEIU strike in solidarity, but have yet to reach a deal of their own contract agreement with the district.
City News Service contributed to this report.