High school students across Ontario have walked out of school Friday to protest changes to sex education and Indigenous curriculum.

The effort is being called the March for Our Education. Students, teachers and staff at more than 100 Ontario high schools 鈥� projected to number about 40,000 鈥� are expected to take part.

By mid-afternoon Friday, the hashtag WetheStudentsDoNotConsent was trending on Twitter.

鈥淚 knew I wanted to empower students across Ontario because I knew there are so many kids that feel outrage about this and feel alienated and scared. I knew I had to do something that everyone could feel a part of because not everyone has the privilege or ability to attend protests or demonstrations,鈥� student organizer Indygo Arscott told 麻豆传媒 Channel Friday.

She said sex ed curriculum should help students to avoid making mistakes or putting themselves in danger.

鈥淪tudents deserve the accurate representation and education in their classrooms. I know way too many people whose entire education about their sexual health comes from the internet and I don鈥檛 think that鈥檚 OK.鈥�

Organizers also plan a student-led sit-in at Queen鈥檚 Park on Sunday.

鈥淲e the students will show our government that we do not consent to their actions. The impacts of these changes have been repeated by hundreds of experts: they will not keep our students, our women, our LGBTQ+ community, or our Indigenous population safe,鈥� issued by organizers.

鈥淚t鈥檚 time for all students to stand up and fight for our right to education. We the students will walk out, protest, and demand the reinstatement of the 2015 sex ed curriculum and re-establishment of the indigenous curriculum rewrite. We the students will not stop. We will not relent. Not until we win this fight.鈥�

Premier Doug Ford鈥檚 government has repealed a 2015 rewrite of the sex ed curriculum and reinstated the 1998 version while it prepares its own program. The 2015 curriculum, which covers same-sex marriage, gender identity, consent and sex in a social media age, was a controversial touchstone during the election campaign. Social conservatives vigorously objected to elements of the curriculum for elementary students, including homosexuality and masturbation.

Ford has enacted a snitch line to report teachers who continue to teach the 2015 content.

The administration has also cancelled a rewrite of the Indigenous studies curriculum that was recommended by the Truth and Reconciliation report.

鈥淚 think it鈥檚 really important for people to see how important this is to us as students because we are the ones who ultimately suffer from this change,鈥� said one student who participated.

Student organizer Firuza Huseynova said while teachers and administrators were broadly supportive, there was some student backlash to the walkout at her Toronto school. 鈥淎 lot of people were saying LGBTQ+ awareness is sort of being forced into students through this curriculum. We really wanted to bring that to light and we wanted to address that.鈥�

Some GTA schools projected close to 90 per cent participation in the walkout and organizers are saying that 鈥渨ith the full backing of teachers鈥� unions and school staff associations, teachers and principals at schools registered for the walkout have even taken the action of moving all major tests and assignments from this Friday to the following Monday to accommodate the school walkouts.鈥�

Ryan Bird, a spokesman for the Toronto District School Board, said Friday that while the student walkouts aren't officially sanctioned, the board wants to make sure everyone who takes part is safe so staff will be onhand to supervise the protests.

"We encourage them to have their say," he said, adding that in spite of the encouragement, students who leave class without permission from a parent will be marked absent.

The province is launching public consultations on a new sex-ed curriculum next week, and a spokeswoman for the education minister said she encouraged people to participate.

-With files from The Canadian Press