Dozens of students rallied in Thailand on Wednesday to demand from the government greater gender rights and an end to what they called outdated curriculum and discriminatory rules on uniforms and haircuts. Onlookers in Bangkok cheered and applauded as students of mixed ages carrying placards and banners and rainbow flags, fans and umbrellas marched to the education ministry in protest at a school system they said was far behind the times. The group included secondary school pupils and some older students. They took aim in particular at rules that prescribe specific hair length and styles for male and female students. “What about students of other genders? This is something the ministry needs to consider because it is normal to be diverse,” said Panupong Suwannahong, 19, a protest organiser. “The school uniform segregates the students’ genders.”