But what about math? Deborah Stipek, a professor at Stanford and the former dean of the school of education, says math is just as important—if not more—to laying the foundations for educational success. But we are not nearly as focused on planting the seeds for a future love of math as we are for reading. “For a variety of reasons, people haven’t paid attention to math,” she says.

Research from 2007 found that math skills for kids entering kindergarten were a strong predictor of both math and reading skills in the third and fifth grades. Author Greg Duncan, a professor at the University of California Irvine, said it goes far deeper: Kids with persistent math problems are 13 percentage points less likely to complete high school than kids with no problems, and are 29 percentage points less likely to attend college.

Source: Stanford’s Deborah Stipek says we should teach more math in preschool — Quartz

The article includes what a math lesson plan would look like in preschool, one that includes play.