Do your employees take UNPAID meal breaks? If so, you might want to be careful of asking them to do any work-related activities on their break. The US Dept of Labor (DOL) is checking up on this. Under their category of “Theft of Wages” they want to ensure that employees are not working for employers off the clock.
For further information about Rest and Meal Breaks, see the DOL website at https://www.dol.gov/agencies/whd/fact-sheets/22-flsa-hours-worked