My daughter is aged 6, nearly 7 [so year 2], I'd say bang average academically, I was just doing home schooling with her now [trying to juggle this with WFH], was fairly staggered to discover that she seemingly didn't know any of the old 'if you mix red and yellow you get orange' type stuff.
Any ideas as to whether this is normal/how one woudl mostly go about teaching this topic?