Is this the problem with Manuel Yvellez and the other Chula Vista Educators union leaders who are struggling with Common Core?

From Education Week:

...There are cases in which educators themselves need more time simply practicing the mathematics and learning different ways of conceiving of it, she added. Fractions, which under the common core are introduced in 3rd grade, tops that list.

It's a point reiterated by Katherine K. Merseth, a senior lecturer and the director of teacher education at the Harvard Graduate School of Education, who believes the shifts will require more programs to improve their content preparation.

Lipscomb University in Nashville, Tenn., is sharing a library of video-based tools in order to familiarize the state’s teacher colleges with the common core and its implications for preparing new talent.

"Kids can learn to invert and multiply in order to divide fractions, but then they look at the teacher and ask, 'Why'?" Ms. Merseth said. "We have to make sure that our students and our graduates can answer exactly that question."

The lack of preparation of teachers (especially if they are union leaders like Manuel Yvellez) has been causing a lot of problems for the implementation of Common Core.

See blog posts about Common Core from CVESD Reporter.