Free DC had a webinar on this on Wednesday, and there is a youth-oriented one coming up this week:
https://freedcproject.org/event-list/know-your-rights-youth-centered-training
It was also a primary topic at Councilmember Lewis George's Ward 4 town hall last night. Schools are creating rapid response teams to send witnesses, etc. I highly recommend checking in with your schools' parent organization and with Free DC. All upcoming events posted here:
https://freedcproject.org/event-list