IIn this 4.NF.3 Fourth Grade Common Core Lesson, students add fractions and mixed numbers with common denominators.

In this 4.G.3 Fourth Grade Common Core Lesson, students recognize a line of symmetry for a two-dimensional figure as a line across the figure such that the figure can be folded along the line into matching parts.

In this 4.MD.5 Fourth Grade Common Core Lesson, students recognize angles as obtuse, acute or right by playing War!

In this 4.NBT.3 Fourth Grade Common Core Lesson, students round numbers to the given digit.

In this 4.NF.5 Fourth Grade Common Core Lesson, students express a fraction with denominator 10 as an equivalent fraction with denominator 100, and thenadd two fractions.

In this 4.OA.3 Fourth Grade Common Core Lesson, students solve multi-step word problems posed with whole numbers using the four operations.

Using this 4.OA.4 Fourth Grade Common Core lesson students determine whether a given whole number in the range 1–100 is prime or composite.

In this 4.MD.1 Fourth Grade Common Core Lesson, studentsknow relative sizes of measurement units within one system of units within a single system of measurement.

In this 4.MD.3 Fourth Grade Common Core lesson students apply formulas to find the area and perimeter of rectangles in word problems.

In this 4.NF.4 Fourth Grade Common Core Lesson, students multiply fractions by a whole number.

In this 4.NF.6 Fourth Grade Common Core Lesson, students convert between decimals and fractions when the denominator is 10 or 100.

In this 4.OA.1 Fourth Grade Common Core Lesson, students interpret a word problem as an equation,picture, group description and an answer.