Holding umbrellas under a blazing sun, the teachers yesterday marched across the capital's main boulevard, snarling traffic yet again after two weeks of protests that failed to block one of the major national reforms pushed by the Mexican leader.
Pena Nieto hailed the Senate's final approval of the legislation, saying that "thanks to your important decision, the children and youth of Mexico will have better quality education."
The law aims to improve an education system that ranks dead last in the 34-nation Organisation for Economic Cooperation and Development by stripping the power of unions over the classrooms and requiring instructors to undergo performance evaluations.
"The inheritance and sale of posts are over," Education Minister Emilio Chuayffet tweeted. "Merit is the right way to enter and grow in a teaching career."
More From This Section
But the teachers argue that the tests will fail to take into account cultural differences in the country, where many often lead open-air classes in remote villages where children first learn indigenous languages.
At yesterday's march, the teachers warned they would balk at taking the tests.
"We are entering a phase of resistance because we will ignore the evaluations," said Norma Cruz Vazquez, a union representative in the southern state of Oaxaca. "For us this is a betrayal and we will not recognise this reform."
"There is discontent nationwide because this reform will affect all social classes," said Rogelio Ojeda, holding a sign reading "Total Rejectino of Pena Nieto's Education Reform."
The legislation is one of the centerpieces of what Pena Nieta on Monday called the "grand transformation" of Mexico.
He has struck a pact with rival parties that has also passed a reform to open up the telecommunications sector. He now plans to introduce more politically-sensitive legislation to open the state-controlled energy sector to foreign investment.