Nether Green Junior School has been told to improve by inspectors after being rated good last time.
Progress by pupils varies from class to class and sometimes is not fast enough, teachers do not always have high enough expectations of what pupils can achieve and the quality of marking is not consistently good, said Ofsted. However, there is some good teaching, children make good progress in reading, their behaviour is good and they encourage each other.
Overall the school is judged to require improvement in three of four categories and is good in the other.
Head Sue Jackson said the school continued to have attainment significantly above national averages, and it will rise to the challenge for more rapid progress in maths and writing.