Students identify equal parts, halves, thirds, fourths, and unit fractions with denominators 2, 3, 4, 6, and 8, interpreting the denominator as the number of equal parts and the numerator as the number selected, and composing or decomposing wholes into unit fractions. They represent fractions with area, set, and number-line models; locate fractions from 0 to 1; recognize equivalent fractions and fractions equal to or greater than one. They compare fractions with the same numerator or denominator and use benchmarks such as 0, 1/2, and 1, solving simple word problems involving fractional parts and addition or subtraction with like denominators.