Most children who have weak early numeracy skills do not entirely catch up with their peers who started school with strong early skills in numeracy …

 „High-quality teaching in the first year or two of school can result in children making rapid progress. However, most children who have weak early numeracy skills do not entirely catch up with their peers who started school with strong early skills in numeracy. High-quality early schooling can also accelerate children’s literacy skills and their self-regulation, although not with the same success as in mathematics, and again, these children do not entirely catch up with their peers who started with strong early skills in literacy.“
OECD (Hrsg.), Early Learning and Child Well‑being (2020), S. 25.