Is it illegal in Ohio to not pay for mandatory meetings?

I work at a child care center paid hourly. One day my boss came to me and said i had a mandatory meeting scheduled at my break time and that I was to clock out go to the meeting for an hour (my break is 1 hour) and then clock back in. She said even though it wasn't paid it would count towards my training hours I need (15 hours in the first year of working there). About 8 of us were in the meeting. A couple weeks down the road... today.. I am told that that meeting will not count towards my training hours either. Is this legal?