Are you asserting that children's math abilities have fallen? I don't think we are far enough past COVID to know the current trend, but math scores were not in general decline prior to 2020.
In my view, modern mathematics curricula are an improvement over rote-learning Euclid, and calculators are a useful tool.
In my view, modern mathematics curricula are an improvement over rote-learning Euclid, and calculators are a useful tool.