They face up to five years in prison.
Several districts in Florida and Georgia will have the technology in place for the 2026-2027 academic year.
Unpaid volunteers who have been addicted to kratom, an opioid-like substance, are providing data that could help federal regulators set policies.
Elias Irizarry pleaded guilty to entering and remaining in a restricted building or grounds.

The new Energy Department guidance limits incentives to electric-to-electric upgrades.
The latest detection in an infected goat follows a pattern of northward creep documented over the past year.
The longtime correspondent was immediately terminated in an email.
An open letter says many UC Berkeley students aren’t prepared for calculus, while some University of San Diego students can’t even do middle school math.
The attack came ahead of the 37th anniversary of the Tiananmen Square massacre, as overseas memorials preserve a history censored in China.
The Republican congresswoman will face Christina Bohannan in November in the swing-prone Iowa district.

The Supreme Court in a 6-3 decision stayed a lower court ruling that had blocked Alabama from using the map.
Rep. Kean has been absent from Congress for months with an unspecific health condition.
Critics have called on Congress to make the government review process mandatory instead of voluntary.
NASA also expressed confidence that some of the company’s upcoming moon base missions could still go ahead as planned.
According to the Human Rights Watch’s World Report 2025, there are ‘extremely high rates’ of violent crime in Mexico.
The tariff rate on agricultural equipment will be lowered to 15 percent.
On Friday, a federal judge in Virginia temporarily blocked disbursements from the $1.8 billion fund.
Colorado Gov. Jared Polis commuted her sentence in May.
The guidance comes amid broader debate over Nvidia chip sales to China and U.S. efforts to protect advanced semiconductor technology.
The curfew near Delaney Hall will remain in effect between 9 p.m. and 6 a.m. until further notice.
It was the seventh such strike in May.
The president revoked regulations that he described as vague, burdensome, and an obstacle to legitimate access.
State police will assume responsibility for the area outside the Delaney Hall after ICE officers agreed to stand down.