A minute's silence will be observed in Wales today on the 50th anniversary of the Aberfan disaster.
Banding System Scrapped In Wales
Education bosses say a change in the way schools are rated will help them improve.
The Welsh Government is getting rid of banding - with a colour coded system coming in instead.
The banding system - which ranks schools from 1-5 - has been in place since 2011.
Critics say the system is "bonkers" with some schools "yo-yoing" from the highest rating to the lowest in one year.
Dr Philip Dixon is from union ATL Cymru. He told Heart: "The banding system was well past its sell by date, it was getting very silly.
"You had yo-yo affects in it and it wasn't really helping schools so this new system will be of much greater to help to teachers and pupils - which is what it's all about."
Instead of being ranked 1-5 - schools will now be part of a colour coded system.
The best performing schools will be rated green, followed by yellow or red for those who need to make significant improvements.
Education Minister Huw Lewis has also said a wide range of data will be looked at over three years - allowing schools to see where they are and what they need to do.
Tragedy struck in the village of Aberfan 50 years ago - here's how the disaster unfolded.
Even with the coal tips removed, the landscape of Aberfan still lives in the shadow of tragedy.
50 years after the Aberfan disaster these photos remain some of the most haunting and iconic images.
Most Viewed Pictures On Heart
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