Here are some links to useful websites.
London Gifted and Talented : resources and information regarding how to support your most able learners.
MAT Wales: resources developed to stretch all children in KS2, using all text types. Look under the ‘training’ link.
Nrich: enrichment activities for maths.
The Darwin Centre: STEM interactive workshops and fieldtrip experiences.
Bob Cox: writer of the Opening Doors to Quality Writing series.