An UCAC spokesperson said schools given money to raise standards were still in the same place or dropped a band this year, and claimed some changes seemed arbitrary.
Representatives from the National Association of Schoolmasters Union of Women Teachers Cymru (NASUWT), the teachers union UCAC and the society for Welsh education CYDAG all gave evidence to the committee.
Elaine Edwards, the General Secretary of UCAC, said that they believed in an independent education system for Wales, and therefore believed that only the assembly should be legislating on education in Wales.