All Math Units

Unlock the complete collection of K–12 math units featuring engaging, standards-aligned lessons that build problem-solving, fluency, and real-world mathematical understanding.

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Grade 3 Math Units

Unit Plan 30 (Grade 3 Math): Area & Perimeter Design Challenge

Design a mini-park under area/perimeter constraints, calculate with A = l × w and decomposition, and justify layout choices using labeled diagrams, units, and clear math reasoning.

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Grade 3 Math Units

Unit Plan 29 (Grade 3 Math): Mixed Operations & Unknowns in All Positions

Represent and solve 1–2 step math stories using equations with a letter for the unknown, bar models, and estimation to check reasonableness and build flexible problem-solving skills.

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Grade 3 Math Units

Unit Plan 28 (Grade 3 Math): Fact Fluency Power-Up—Strategies & Games

Solidify multiplication and division within 100 using properties, fact families, and spaced-retrieval games that build accuracy, flexible strategy use, and confident problem solving.

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Grade 3 Math Units

Unit Plan 27 (Grade 3 Math): Problem Strings—Fractions, Measurement, and Graphs

Daily problem strings build flexible strategies with fractions, elapsed time, mass/volume, and graphs—boosting reasoning, benchmark use, unit precision, and quick comparison skills.

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Grade 3 Math Units

Unit Plan 26 (Grade 3 Math): Multiplying by Multiples of 10—Place-Value Patterns

Multiply one-digit numbers by multiples of 10 using place-value models and properties—not “add a zero”—to build patterns, explain tens-based reasoning, and justify efficient strategies.

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Grade 3 Math Units

Unit Plan 25 (Grade 3 Math): Partitioning Shapes & Unit Fractions of Areas

Partition shapes into equal areas, label each part as a unit fraction (1/b), and use models to justify fair shares in real-world contexts.

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Grade 3 Math Units

Unit Plan 24 (Grade 3 Math): Shapes & Attributes—Triangles, Quadrilaterals, Polygons

Classify polygons by shared attributes; build quadrilateral family trees; justify with properties and counterexamples (e.g., all squares are rectangles).

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Grade 3 Math Units

Unit Plan 23 (Grade 3 Math): Line Plots—Lengths to 1/2 and 1/4 Inch

Measure to the nearest 1/2 and 1/4 inch, create clear line plots, and solve “how many more/fewer” comparison problems using precise units and mathematical reasoning.

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Grade 3 Math Units

Unit Plan 22 (Grade 3 Math): Comparing Fractions with Same Numerator/Denominator

Grade 3 fractions: compare with same numerator or denominator using area and number line models; record with <, >, = and justify clearly using same-whole reasoning.

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Grade 3 Math Units

Unit Plan 21 (Grade 3 Math): Fraction Equivalence—Same Whole, Same Size

Grade 3 equivalent fractions: prove pairs like 1/2=2/4 with area and number line models, emphasizing same whole/same size reasoning, clear labels, and concise explanations.

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Grade 3 Math Units

Unit Plan 20 (Grade 3 Math): Fractions on the Number Line—Benchmarks & Reasoning

Use benchmarks (0, 1/2, 1) to locate and compare fractions on number lines; partition equal intervals, label a/b precisely, and justify fraction size with clear >, <, = reasoning.

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Grade 3 Math Units

Unit Plan 19 (Grade 3 Math): Fractions as Numbers—Parts of a Whole

Understand unit fractions and place fractions on number lines: build a/b from 1/b, partition equal intervals, and locate fractions precisely to deepen number sense.

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Grade 3 Math Units

Unit Plan 18 (Grade 3 Math): Midyear Synthesis—Facts, Area/Perimeter, and NBT

Mixed 3rd-grade math review: practice fact fluency, area vs. perimeter, rounding, and two-step word problems using models, equations, and estimates.

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Grade 3 Math Units

Unit Plan 17 (Grade 3 Math): Measurement—Mass & Volume Word Problems

Solve real-world mass (g/kg) and volume (L) word problems—one- and two-step—by modeling situations, writing equations with unknowns, and checking reasonableness using consistent units.

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Grade 3 Math Units

Unit Plan 16 (Grade 3 Math): Perimeter—Walk the Edge

Measure and add side lengths to find perimeter, solve missing-side problems with equations, and clearly distinguish perimeter (linear units) from area (square units) in real-world contexts.

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Grade 3 Math Units

Unit Plan 15 (Grade 3 Math): Area Formula A = l×w & Additive Area

Use A = l × w to find rectangle area, label in square units, and decompose rectilinear shapes into smaller rectangles to add their areas using the distributive property.

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Grade 3 Math Units

Unit Plan 14 (Grade 3 Math): Area as Unit Squares—Foundations

Understand area by tiling rectangles with unit squares and counting rows and columns; use arrays and repeated addition to model and label area in square units.

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Grade 3 Math Units

Unit Plan 13 (Grade 3 Math): Two-Step Word Problems & Reasonableness

Solve two-step word problems with unknowns in any position using equations and visual models, then use rounding and estimation to check for reasonableness and clearly justify solution steps.

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Grade 3 Math Units

Unit Plan 12 (Grade 3 Math): Multiplication & Division Facts—7s, 8s, 9s

Develop fact fluency for 7s, 8s, and 9s by breaking apart factors with the distributive property, leveraging patterns like 10n−n for 9s, and linking multiplication to division through fact families for efficient strategy-based mastery.

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Grade 3 Math Units

Unit Plan 11 (Grade 3 Math): Multiplication & Division Facts—3s, 4s, 6s

Build fact fluency for 3s, 4s, and 6s using doubles/near-doubles, arrays, equal groups, and distributive decomposition, while connecting multiplication and division through fact families to boost accuracy and efficiency.

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Grade 3 Math Units

Unit Plan 10 (Grade 3 Math): Multiplication & Division Facts—2s, 5s, 10s

Build early fluency with 2s, 5s, and 10s by spotting patterns on the hundreds chart, skip counting, and using place-value structure; connect multiplication and division through fact families, arrays, and number lines.

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Grade 3 Math Units

Unit Plan 9 (Grade 3 Math): Picture & Bar Graphs—Ask/Answer “How Many More/Fewer?”

Create and interpret single-unit picture and bar graphs with clear titles, labels, and keys; compare categories to answer how many more/fewer and total questions in one- and two-step contexts.

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Grade 3 Math Units

Unit Plan 8 (Grade 3 Math): Time & Intervals—Word Problems with All Operations

Build fluency telling and writing time to the minute, finding elapsed time with timelines, and solving one- and two-step word problems using equations with unknowns—checking reasonableness with benchmarks and inverse thinking.

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Grade 3 Math Units

Unit Plan 7 (Grade 3 Math): Addition/Subtraction within 1,000—Methods & Reasoning

Build fluency adding and subtracting within 1,000 by using place-value strategies, compensation, open number lines, and standard algorithms—explaining steps, checking for reasonableness, and critiquing mathematical reasoning.

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Grade 3 Math Units

Unit Plan 6 (Grade 3 Math): Place Value to 1,000 & Rounding

Build place-value fluency to 1,000 by reading/writing numbers, comparing with number lines, and rounding to the nearest 10 or 100 to make quick, reasonable real-world estimates.