Assembly Bill 1220 would require teachers to spend three years in the classroom before getting tenure.
Even sympathetic senators cite misgivings with bill's current form.
Students Matter pulls its support, but Assemblywoman Bonilla gains other backers.
The bill would mandate coaching for ineffective teachers and make it easier to fire them.
The lawsuit challenged several statutes regarding teacher hiring and firing.
Teacher tenure, layoff and firing statutes are at stake.
State laws defining teacher tenure, layoffs by seniority and dismissal procedures are at stake.
Troubles loom for unions but not for schools, after Prop. 30 is extended.
Legislators call for action in response to judge's ruling in Vergara lawsuit.
Law professors, educators and others on both sides make their arguments.
Teachers backed by StudentsFirst claim free-speech violations.
Lawmakers say they need to respond now to Vergara ruling.