German Chancellor Olaf Scholz is “really worried” by the disastrous performance of the country in a major international survey of educational achievement, his spokesman said on Wednesday. In reading, mathematics and science, the results of the PISA assessment of 15-year-olds in German schools showed the lowest scores ever measured in the country. Spokesman Steffen Hebestreit said the assessment, which was conducted around the world in 2022, showed the clear impact the pandemic had on students’ learning and developing. He also acknowledged that Germany’s scores showed “a strong correlation betw…