By last fall, he was looking at the results of 22 studies involving 4,250 children.
The study involves 65 children 1 to 3 years old.
Another popular series has involved children, ages 10 to 15.
Many cases, especially those involving young children, are not recognized or reported.
For the record, she believes no case involving children should be open to the media.
The study drew from research involving children in more than 990 schools.
"Doing other things that don't involve children is not a problem," she said.
A good school will involve teachers, parents and children in the design of the curriculum.
There are children involved and they pick up on negative feelings.
And most accidents involve children under the age of 5.