"Setting our teachers on fire is only asking our students to burn along with them," Malorie Weber wrote in her resignation letter.
The handwritten assignment included a prompt that read, "Your family owns slaves. Create a list of expectations for your family's slaves."
The new policy enforced by the Texas school district makes students roll up their sleeves when wearing sweatshirts or hoodies so that teachers can see their forearms.
The principal of an elementary school in Memphis held a mock funeral to motivate teachers to work harder at raising students' grades, but several attendees found it offensive.
Laurens Middle School was doing a compulsory dress-code inspection when a teacher took Ethan Orr to the principal's office for an "emerging hole" in his jeans.
Although the Texas school district's dress code states that "boys may not wear makeup," students are working with administrators to find common ground.
The ACLU stepped in after there were concerns about the school's enforcement of the dress code, which had been revised to allow leggings.