Ysgol Cynddelw and Ysgol Llanarmon Dyffryn Ceiriog are part of the Dyffryn Ceiriog federation. The headteacher is supported by a deputy headteacher at the Ysgol Cynddelw site and a head of site at Ysgol Llanarmon Dyffryn Ceiriog. Ysgol Cynddelw provides Welsh and English-medium education for pupils in two separate streams. With the enthusiastic support of the staff, the headteacher has created a clear and robust vision based on ensuring that pupils’ well-being and the development of their Welsh language skills are at the forefront of the life and work of the schools in the federation. Leaders, including governors, have an appropriate understanding of the school’s strengths and areas for improvement. They include staff in the self-improvement process effectively by developing their understanding of the standard of provision and progress in pupils’ skills. However, self-evaluation processes do not always enable leaders to identify areas for improvement and the steps that are needed to develop provision further. Leaders are extremely active in ensuring that all members of staff work together effectively to improve the quality of provision for pupils. Teachers plan jointly effectively to provide a curriculum that meets the needs of many pupils successfully. Teachers provide learning experiences that are effective in supporting pupils to make progress in their skills, particularly their Welsh oracy skills and digital skills. However, teachers do not always provide opportunities for pupils to apply their extended written skills or numeracy skills consistently enough across the areas of learning and experience. Nearly all pupils behave exceptionally well. They treat each other, staff and visitors with respect. Pupils enjoy the range of stimulating and engaging experiences that are provided for them. They work together effectively in the learning areas and are willing to contribute to class discussions and share their ideas maturely and sensibly. When pupils are given an opportunity to do so, most concentrate well and engage conscientiously when responding to challenges in their work. However, teachers do not always provide enough purposeful opportunities for pupils to develop their skills in independent learning activities.