The American Civil Liberties Union recently hosted a live online video training on student free speech rights given by ACLU attorneys. The video is now online here:
https://www.youtube.com/watch?v=Q6ghXMtooV8
and the graphics from the session are here:
https://www.aclu.org/other/students-know-your-rights-presentation

The training covered various ways that the First Amendment protects students’ rights to express their views. It also included what schools can and can’t do when it comes to disciplining students for various actions, like posting on social media, walkouts, and wearing clothing with slogans.
"We know that the outpouring of students’ voices sparked by the Parkland shooting is just getting going, so if you’d like to get the ACLU expert legal perspective going forward, please let me know," says Josh Bell if the ACLU. "There’s also our online Know Your Rights feature for students," which is copied below.

Students’ Free Speech Rights in Public Schools
If you’re a public school student, you don’t check your constitutional rights at the schoolhouse doors. But whether schools can punish you for speaking out depends on when, where, and how you decide to express yourself.

Do I have First Amendment rights in school?
Yes. You do not lose your right to free speech just by walking into school. You have the right to speak out, hand out flyers and petitions, and wear expressive clothing in school — as long as you don’t disrupt the functioning of the school or violate the school’s content-neutral policies.
What counts as “disruptive” will vary by context, but a school disagreeing with your position or thinking your speech is controversial or in “bad taste” is not enough to qualify. Courts have upheld students’ rights to wear things like an anti-war armband, an armband opposing the right to get an abortion, and a shirt supporting the LGBT community. And “content-neutral policies” means rules that have nothing to do with the message you’re expressing, like dress codes. So, for example, a school can prohibit you from wearing hats — because that rule is not based on what the hats say — but it can’t prohibit you from wearing only pink pussycat hats or pro-NRA hats.

Can my school discipline me for participating in a walkout?
Yes. Because the law in most places requires students to go to school, schools can discipline you for missing class. But what they can’t do is discipline you more harshly because of the political nature of or the message behind your action.
The exact punishment you could face will vary by your state, school district, and school. Find out more by reading the policies of your school and school district. If you’re planning to miss a class or two, look at the policy for unexcused absences. If you’re considering missing several days, read about truancy. And either way, take a look at the policy for suspensions. In some states and districts, suspension is not an available punishment for unexcused absences. And nationwide, if you are facing a suspension of 10 days or more, you have a right to a formal process and can be represented by a lawyer. Some states and school districts require a formal process for fewer days, too. Also, you should be given the same right to make up work just as any other student who missed classes.
Find out the rules so you can tell if they are being applied differently when it comes to your walkout.

What about for protesting away from school?
Outside of school, you enjoy essentially the same rights to protest and speak out as anyone else. This means you’re likely to be most protected if you organize, protest, and advocate for your views off campus and outside of school hours.

What are my rights on social media?
You have the right to speak your mind on social media. Your school cannot punish you for content you post off campus and outside of school hours that does not relate to school. Some schools have attempted to extend their power to punish students even for off-campus, online posts. While courts have differed on the constitutionality of those punishments, the ACLU has challenged such overreach.

This announcement submitted by Josh Bell
American Civil Liberties Union
212-549-2508
jbell@aclu.org