WELSH Education Minister Jane Davidson yesterday reiterated her demands to know if registered sex offenders have been allowed to work in our schools.
She said she is backing plans to change the law in line with the recommendation from the Bichard Report into the Soham murders.
Ms Davidson, is due to make a statement to AMs on Tuesday on the issue.
She said yesterday, "I do not think that anybody who is on a sex offenders' register should be teaching in our schools. I will be doing what I can in Wales to make sure that is not the case.
"We have always been very clear from Wales that there should be one list.
"The reason that Michael Bichard said there should be one list post-Soham, was so that it could be absolutely clear and everybody understood what was going on, and I thought that that recommendation was one that we should all absolutely get behind.
"We did from the Assembly Government and we will be strongly supporting that recommendation in the proposed legislation.
"I have to say that we were deeply shocked to find that there were people teaching in our schools who were on the Sex Offenders' Register.
"We don't have any evidence that there are any teaching in Wales at the moment.
"I am, as you can imagine, making absolutely sure of that, before I make a statement to Assembly Members on Tuesday, but the fundamental thing which we all have to do very quickly is to make sure that this can no longer continue."
Although most education matters are devolved in Wales, List 99, the register of people who should not be allowed to work in schools in England and Wales, is a Westminster responsibility.
Opposition parties in Wales have demanded reassurances that sex offenders have not been allowed access to schools here.