Uncertainty over a salary proposal, a state supreme court decision on school funding, and a class-size referendum all propelled the walkout.
Teacher-candidates who have struggled to pass a series of new licensing tests in New York will be given new flexibility.
For the most part, there was no consistent relationship between the standards and better teaching.
A judge's ruling last summer to overturn teacher-protection statutes was thinly argued and misread state constitutional law, they contend.
Veteran teachers getting a score of "effective" or better don't have to follow current rules for demonstrating subject-matter knowledge.
Fewer teachers got ratings of "effective" or better under the state's controversial new rating system.
James G. Cibulka will be replaced by a former state superintendent until a new president can be found.
The grants will be awarded on a competitive basis.
Only 17 percent of teachers tracked in a federal longitudinal study left the profession, far fewer than the often-cited 50 percent.
Fearing its members will be penalized, the union wants to eliminate the tax on high-cost health-care plans