From Keep Focus on your Math Teaching in Homeschool Math Blog
"They are recommending focusing on whole-number arithmetic and place value in the early grades, measurement being an important, closely connected theme. After mastering that, they said focus should next be on fractions & decimals, and then onto percents, ratios, and proportions."
What is Important in School Mathematics
"Whole number arithmetic and the place value system are the foundation for school mathematics with most other mathematical strands evolving from this foundation. This foundation should be the subject of most instruction in early grades. "