Witty Rejoinder said:

What does ‘maths enrichment’ involve? I fear you are raising nerds…

it’s done at the local university.. a maths tutor does extension activities for kids who ‘have shown potential in school’.. miss j has done it for the past two years, but MrA has his first year this year (they only start them at grade five) it’s mostly ‘tricks’ in working out long sequences of sums..