The BBC presenter grew up in Crawley and went to Three Bridges Primary School on his return and was filmed in the assembly hall with the children - who got a chance to show off their dance skills to Dan and Nadiya.
And they were impressed. Nadiya said: "At that age when I was 10 or 11, I was a dancer myself, but I don't think I would have that kind of confidence to improvise on the stage and in front of everyone. It was so impressive and I loved it. It was so nice to see them."

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And visiting the hall brought back great memories for Dan, who now lives in Sheffield. He said: "The hall’s changed a bit but that is the actual hall that I used to have my assemblies in. And I said to Nadiya ‘that’s where the DJ used to be for school discos’. And that’s where I sat being a goon in the corner over there.
"Seeing the smiles on the kids faces was great. It’s quite special to have a slice of that."
This weekend's Strictly Come Dancing theme is School Disco and Nadiya did not know what a school disco was before training for these week's Cha Cha Cha.
Dan said: "It shows the difference between me and Nadiya. I said to her ‘have you ever been to a school disco?’. And she said ‘not really, I don’t know what one is’.
"So this is her first school disco this weekend. So I asked 'what were you doing when you were 11 or 12’ her reply was ‘I was competing in the world championships'.
"So a slightly different childhood and here we are together!"
It was Nadiya's first visit to Crawley and Dan took her in the town first thing.
Nadiya said: "I am enjoying it. The first thing in the morning I need coffee so he took me to Queen's Square where I got my Starbucks. It’s a great experience to watch him come back to his old school. I don't think I will ever experience going back to my school. To see him after not visiting for so long."