The main sticking point was increasing base pay, including lessening teachers' reliance on one-time bonuses for things such as having students with high test scores.
The three men and a teen allegedly planned to attack the community of Islamberg. Police said they found 23 firearms and three improvised explosive devices.
Baker, author of The Times' "Observer" column for 36 years, won two Pulitzers and praise as one of the finest 20th-century American writers.
Mayor Eric Garcetti praised both the union and school district administrators.
Teacher pay, charter school expansion and class size -- which is far higher in Los Angeles than the national average -- were all on the table during the strike.