As an AI language model, I don’t have access to real-time data, so I can’t provide you with the rankings for the year 2023. The rankings of education systems are based on various factors and can change over time. However, as of my last knowledge update in September 2021, the following countries have often been considered to have strong education systems:
4. South Korea
9. New Zealand
Please note that these rankings are subject to change as various organizations and reports might have different criteria and assessments for evaluating education systems.