Thousands of teachers protested in Kentucky and Oklahoma, demanding pay rises and better public school funding.
Many courses have been suspended in these two US states. In some areas, schools have closed due to the spring break, but in others authorities have been unable to find replacements.
The mobilizations are the latest in a series of public-school teachers following a nine-day strike in March in West Virginia (east) that resulted in teachers in this state receiving a first-time increase in their salaries over a period of 4 years.
In Kentucky, protesters gathered in front of the local parliament to protest a plan to change their retirement terms and demand public school funding.
In Oklahoma, where many educators say they have taken a second job to meet their needs, such as waitresses in restaurants, a $ 6.100 salary increase on average is considered insufficient.