THIS IS WHY WE DO WHAT WE DO.
We pulled our daughter out of public school mid-way through 6th grade. We began homeschooling instead. One of the reasons we chose this route was because the math instruction was terrible. The confusing methods used in common core had caused great damage to our daughter's math ability and confidence.
I made some progress teaching her math from some decent textbooks, but what she really needed was a lot more practice. This workbook fits the bill well!
The problems are well-designed so that they work out elegantly without a lot of "grunt work." Fun illustrations of planets, rockets, aliens, and other astronomical phenomenon on every page are entertaining to kids and adults alike.
The problems are also fun. I have a math education that includes seven college-level courses (four levels of calculus, differential equations, matrices & linear algebra, etc.), and still I have to slow down and think for a minute about how to best approach some of these problems, since they ask atypical questions.
My daughter and I sit down together and I let her work the problems, asking me for clarification when she gets stuck. At first she lacked confidence and asked for help on every single problem. But after doing the first problem set, she began to work most of them on her own, and even admitted that some of them were fun!
I cannot praise this workbook enough, and only wish that there were more workbooks written like this.