Students read, write, name, compose, decompose, and represent whole numbers from 0 through 1,000 using hundreds, tens, and ones, including expanded form, word form, numerals, base-ten blocks, and the value of each digit. Students count forward and backward by ones, tens, and hundreds; skip-count by 2s, 5s, and 10s; locate missing and labeled numbers on number lines; compare and order numbers through 1,000 using place value and $<$, $>$, and $=$. Students identify even and odd numbers, estimate quantities through 1,000 using benchmarks, and round two-digit numbers informally to the nearest ten.