In 1st Grade my daughter had a Male Teacher.
He was getting his degree in education at the University.
So he was interning in my daughter's class.
He had also, taught at other grade levels including Kinder and higher grades.
He was LOVED by both the Faculty and kids and other Teachers.
He was that good, of a teacher.
Very seasoned and good with kids.
Even if he was still getting his degree.
Since Kinder, my daughter has also had a Male P.E. Teacher.
VERY good Teacher. Tops.
Very good with kids.
Highly educated too.
The kids love him as well as the faculty.
I have never heard nor thought, that it was more 'normal' for Male Teachers to be only working with preteens/teens/young adults.
That is a perspective... and personal view.
Not a fact.
But no matter what, all Moms have a "Mommy gut instinct" or radar about things.
NO matter if it is a male or female teacher.
You said, this teacher of your son "claims" to be taking classes to become a Teacher.
Well, you can simply ASK the Director of your son's school.... to confirm that.
I'm sorry, your son goes to Daycare.
Still... the Daycare Director... WOULD have his resume/school credentials and he has to have been Back-Ground checked.
Also, Preschools have State requirements about their faculty. Preschool teachers, have to be credentialed etc. and certified, AND Back-Ground checked. (because they work with children).
So. Preschools do not just pick up anyone off the street... to then teach at their school.
A person, any Employee of the school, HAS TO BE and meet, the State's requirements for its Faculty members.
I would think, this would be the same for Daycare businesses too.
They NEED to be Back-ground checked.
For example: I once asked to Volunteer at a Preschool. I was told I could not, because I do not have the State required Preschool requirements/degrees/credentials and certifications... to then put me on as a "staff" member of the school. And, even just to Volunteer there, I would HAVE TO HAVE a Back-ground check, too.
You can simply talk to your Daycare Director.
Unless you do not trust them, either.
No matter if a Care Provider is male or female... common sense needs to apply.
It is not true, that "most men" do not like working for long periods of time around children under the age of 5.
all the best,