Director of the children and young people's service Chris Pratt said Doncaster Council "must do better to improve services".
He added: "We are using these reports as a major opportunity to up our game and are determined to rejuvenate our improvement plan to speedily put in place the changes that will provide maximum protection for all our children and young people."
More top news
Nearly one million people could have their homes repossessed because they do not have a plan to pay off their interest-only mortgages.
Social services officials think that Charlie Clift, five, and Kaiton Warnes, two, are in North Cyprus with their mother Amelia Warnes, 23.
Aylan Kurdi, three, and his brother Galip will be buried with their mother in Kobane, the city they tried so desperately to escape.