Sequoia Carrillo

Canvas is still investigating the extent of the attack.

Sequoia Carrillo, NPR News.

Students and teachers saw a black screen when they logged onto Canvas on Thursday with a message stating that a ransomware group had hacked the platform, demanding money in exchange for students' data.

This is just the latest in a recent string of cyber attacks targeting young people.

Dozens of school districts have reported hacks in the last few years.

Canvas is back online, and for immediate concerns, like whether students will get their grades on time or if exams can take place,

Things seem to have gone back to normal.

But cybersecurity experts say just because a platform is back up does not mean the data breach is over.

Canvas is still investigating the extent of the attack.

NPR's Sequoia Carrillo reporting.

This week's study found that states with restrictions saw dramatically reduced cell phone activity in schools.

Teachers reported that the number of students using cell phones in class dropped on average from 61% to just 13%.

On the other hand, the research found that the bans had a quote, close to zero effect on students.

on test scores.

But Thomas Dee, a professor of economics at Stanford and a co-author on this study, characterized this research as the first draft of a new approach to schooling.

Even though these bans are very popular with teachers and across party lines, this is new territory.

Sequoia Carrillo, NPR News.

This week's study found that states with restrictions saw dramatically reduced cell phone activity in schools.

Teachers reported that the number of students using cell phones in class dropped on average from 61 percent to just 13 percent.

On the other hand, the research found that the bans had a, quote, close to zero effect on test scores.