2010 (1)
2011 (1)
2013 (42)
2018 (128)
2020 (783)
2021 (1188)
2022 (1546)
A. NATIONAL EDUCATION ASSOCIATION
1. https://www.nea.org/careers
3. 工資: https://www.unionfacts.com/employees/National_Education_Association
B. AMERICAN FEDERATION OF TEACHERS
1. https://www.aft.org/careers
3. 工資:https://www.unionfacts.com/employees/American_Federation_of_Teachers