“We will roll out a balanced, patriotic curriculum. The British Empire did so much good for the world, for civilisation, including my ancestors,”
That's a pretty debatable assertion and not one that many people from the former colonies and people who know their British history would necessarily agree with. She does not want other sons and daughters of immigrants to benefit from the same opportunities that she benefitted from, and voted to deny all British youngsters the chance to follow her in footsteps and broaden their horizons through study in Europe.
As for singing hymns - will children who are non-Christian (including Braverman's own children) or whose parents follow no religion at all also be required to sing along, or do they just stand there like lemons. Likewise those who are not British subjects or who are not Monarchists - will they be required to sing the miserble dirge in praise of the King or do they just refuse, and if they do so, with what consequences?