Second grade, we need you!
Second-grade teachers, you are the last stop on the train before the numbers students calculate become significantly larger. Students will need an understanding of place value to use it strategically to solve complex problems.
Students also need a strong understanding of place value to solve problems involving decimals of tenths, hundredths, and thousandths, which rely deeply on students’ knowing how to make groups of tens and hundreds.
When I see fourth, fifth, sixth, and seventh-grade students struggling, I can almost always make a direct connection to the NBT standards in the first and second grades.
For example, fourth graders must know that 4,000 is ten times as much as 400. I can draw a direct line back to the second-grade standards.
Fourth and fifth graders must understand the relationship between one whole, one-tenth, one hundredth, and one thousandth. Again, this concept directly relates to the NBT standards for bundles of tens and hundreds.

If things are falling apart for fourth—and fifth-grade students, we can blame a limited understanding of the first—and second-grade standards.
If the students don’t understand the concept in first grade, we must catch them in second grade before the daily undeniable pressure of state testing begins in third.
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