Plaid Cymru has described the replacement of the controversial banding system with a new school categorisation model as "a step in the right direction."
Party of Wales Shadow Education Minister Simon Thomas has welcomed the replacing of the banding system with a new way of assessing school standards.
The Mid and West AM said scrapping banding was a step in the right direction as the Welsh education system moves to improve standards.
“It is disappointing that the Education Minister has not allowed for proper scrutiny on this matter by making a statement in the Senedd.
“An incoming Plaid Cymru Welsh Government would have scrapped the banding system after the 2016 election, so I’m glad the present Welsh Government has replaced it now.
“We have always called for support for underperforming schools and hope that the new system will provide this support. The fact that support services are to be provided by the education consortia means that there is work to be done to strengthen the consortia.
“Plaid Cymru is has always been clear that a strong education system is the foundation of a strong economy, and that is why we will always strive for excellence.”
Headteachers' union ASCL Cymru has welcomed the introduction of a new system for ranking schools in Wales to, saying "it has real promise."
It replaces the controversial 'banding' system for secondary schools.
A new school rating system has been outlined by the Welsh Government.
It will replace the controversial banding model for secondary schools.
Primary schools will also be ranked - including the smallest ones.
Schools will be placed into a colour-coded system: green for the best, yellow then amber, and red for those struggling. These ratings will be released each January, starting in 2015 - on the My Local School website.
Schools will be judged according to key performance measures but with a self-evaluation from schools, on their leadership, teaching and learning, taken into account after analysis from regional advisers.
Banding was heavily criticised by unions and opposition parties as too volatile, with some schools jumping several bands in a year, and crude, based on a small number of data methods.
The data that will be used for ranking secondary schools has not been revealed yet - it is now due in October.
For primary schools, pupils' performance in key subjects at age 7 and age 11 will now be used, alongside attendance rates - and the scores compared with other schools with a similar number of pupils from poorer backgrounds.
The performance data will be taken from over three years, rather than one under banding, in an attempt to stop volatility, and allow fair judgement of smaller primary schools.
Schools will be placed into the colour bands, but not given individual scores, and the system is no longer relative - they could all theoretically climb to the top.
The Welsh Government has stressed that schools being categorised by their local authorities has been going on for some time - and that the process will continue under the system of four new education consortia aimed at improving standards around Wales.
In January, it said "all consortia categorise their schools, but they use four systems. A single national categorisation model will ensure that the regional consortia are assessing schools in a consistent way."
The Welsh Government has had to repeatedly deny that the national categorisation model is replacing the controversial secondary school banding system, and faced criticisms that it has provided too many forms of assessment for schools.
The Welsh Liberal Democrats say the announcement that the secondary banding system will be "revised" from this autumn, and run alongside a new National Categorisation System, will create "more confusion" in schools, as they are being assessed in too many different ways.
The Welsh Government said in January that "a single national categorisation model will ensure that the regional consortia are assessing schools in a consistent way", and that the system already works alongside banding.
There is little detail on how the categorisation model works.
Headteachers union ASCL Cymru has predicted that the controversial secondary school banding system will be scrapped after 2016, and fully replaced by the new 'National Categorisation System'.
The Welsh Government has previously insisted that "banding is here to stay" and today announced it would be "revised" from this autumn, alongside the categorisation model, developed by regional consortia.
Robin Hughes, secretary of ASCL Cymru, has said that the categorisation system "has merit and promise" - without the "yo-yo grading" of banding.
The Welsh Government has announced that its controversial banding system for secondary schools will be "revised" from this autumn - and a new "grading" system for primary schools will also be introduced later in 2014.
Secondary school banding was introduced in 2011, but teaching unions and opposition parties have criticised it as based on crude measures and volatile - with some schools jumping several bands from one year to the next.
In January, Education Minister Huw Lewis insisted "banding is here to stay", after reports it was to be scrapped - but that a planned review after three years was underway.
Mr Lewis said today that the measures included in banding "are being reviewed to ensure that the model continues to align with our priorities for education, in particular with a focus on reducing the impact of deprivation on attainment."
There is no more detail on how a new system could work.
Plans to introduce a similar ranking system for primary schools were delayed in 2012, with previous Education Minister Leighton Andrews saying the introduction of annual reading and numeracy tests for pupils in Years 2 to 9 would provide the data needed to band schools.
Those tests were introduced last year, and pupils are sitting the second set of them over the next week.
Education Minister Huw Lewis said today: "A primary school grading model is also being developed to help us better identify schools most in need of support. It will give parents across Wales a clear picture of how schools are performing."
He also reiterated that the reviews of secondary banding and primary grading would happen alongside a new 'National Categorisation' System', from the regional education consortia, which is designed to identify what support struggling schools need.
Responding to the Western Mail's report of a new colour-coded ranking system for Welsh schools, the Welsh Government has appeared to confirm it is introducing a different model for categorising school performance, which it said will provide national consistency.
It has though insisted the existing banding system is not being replaced.
Wales' Education Minister has taken to Twitter this morning to insist "banding is here to stay."
Huw Lewis said work on reviewing the controversial ranking system is ongoing.
The Welsh Government has insisted that the controversial system of banding secondary schools is "here to stay", after the Western Mail reported that it was to be replaced with a "tough new ranking system."
Banding - where schools are ranked in five bands, based on GCSE results, performance in specific subjects, attendance and the achievements of pupils of poorer backgrounds - was introduced in 2011, and three sets of tables have been published so far.
League tables were scrapped in Wales in 2001, and the Welsh Government has insisted banding is not a new form of league tables, but a way of identifying which schools needed support.
The banding system has been criticised by unions and opposition parties, who have said it is volatile and crude.
The Western Mail reported today that there will be a new colour-coded system, where schools struggling in the 'red zone' could face intervention or even closure.
The Welsh Government has responded to the story, saying its planned review of the banding system is "ongoing".