A culturally responsive classroom is one where every pupil sees themselves reflected — in the curriculum, in the examples, in the texts, in the people on the wall — and where every pupil's background is treated as an asset, not a deficit to be overcome.
Audit your curriculum and examples. Whose stories are told? Whose are missing? Are non-European mathematicians, scientists and writers visible? Are family structures, names and traditions reflected in the examples you use? Small changes — the names in maths word problems, the texts on the reading list, the historical figures studied — communicate a great deal.