I'm sure she thinks she deserves at least $3 per hour per student, which would work out to a 23 hour week for the 40 weeks or so which she works per year.
It is kind of like a million dollar a year mediocre major league baseball player saying he really less than $0.14 per hour: one million divided by 162 games x 3 hours times an average paid attendance of 15,000 fans.
Yep, that took me aback too, when I realized she was talking about being paid a separate hourly rate for each child, even though she is not offering individualized instruction.
Every worker can play that game.