Secondary school students in Thailand's capital rallied Saturday for educational and political reforms, defying government threats to crack down with legal action against the country's high-profile protest movement.

Fed up with an archaic educational system and enraged by the military's efforts to keep control over their nation, the student-led campaign that began earlier this year has shaken Thailand's ruling establishment with the most significant campaign for political change in years.

The student-led protest movement has declared three core demands: holding new elections, amending the constitution and ending the intimidation of critics of the government.