Common Core. Is It Improving Education?

Many states have adopted a new education curriculum called Common Core. With the new curriculum, subjects like Science and Social Studies have been less stressed and not a primary focus. The more test and stressed subjects are Math and Reading/Language Arts. In my opinion, this would hurt the children later in life. I feel it is better for children to have a well developed understanding of all the subjects instead of having a strong understanding of Math and Reading and a weak understanding of Science and Social Studies. Your opinion?