🌻 The newest case — place value, arrays and area

The Blooming Bandit — a K–5 Common Core Math Mystery

The Blooming Bandit is the most recent mystery, and it is the one that quietly teaches the bridge from adding to multiplying. The prize Golden Sunflower was stolen the night before the Bloomtown Flower Show, and the investigation runs through a garden: seeds that must be bundled into hundreds, tens and ones; flower beds that must be replanted in rows and columns; a trellis that the bees hop along in even jumps; sprouts that have to be measured and charted. Rows and columns are an array, an array is multiplication, and an array with a ruler across it is area — so a cadet who plays this case from Kindergarten through Grade 5 walks that whole road without ever being told they're doing it.

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The case

The prize-winning Golden Sunflower vanished the night before the Bloomtown Flower Show! Bundle the spilled seeds, replant the trampled beds, hop the bee-line trellis and rebuild the sprout charts to unmask the Blooming Bandit.

The four clue rounds

Each round is a different interactive mechanic — not the same question in a new coat. Crack all four to unmask the culprit.

The Potting BenchSpilled seeds are bundled into trays of a hundred, packets of ten and loose ones — place value made physical, which is the only way it ever really lands.
The Garden BedsBeds are replanted in rows and columns. This is the array: repeated addition at Grade 2, multiplication at Grade 3, and area with a formula by Grade 4.
The Bee-Line TrellisThe bees hop along a number line in equal jumps — skip-counting at the low end, and the structure of multiplication and division at the top.
The Sprout PatrolSeedlings are measured and plotted on a line plot, so measurement data turns into a chart the cadet then has to read back.

The Blooming Bandit at every grade, K–5

The same story, re-levelled for each grade against its own Common Core standards. Pick your child's grade:

Grade	Skill focus	Standards	XP
Kindergarten	Teen numbers, count arrays, count on & compare heights	K.NBT.A.1 K.CC.B.5 K.CC.A.2 K.MD.A.2	⚡ 100 XP	Launch →
Grade 1	Tens & ones, count on, add on the vine & order lengths	1.NBT.B.2 1.OA.C.5 1.NBT.C.4 1.MD.A.1	⚡ 110 XP	Launch →
Grade 2	Place value, rows × columns, number lines & line plots	2.NBT.A.1 2.G.A.2 2.MD.B.6 2.MD.D.9	⚡ 130 XP	Launch →
Grade 3	Division, area by unit squares, +/− within 1000 & half-inch plots	3.OA.A.2 3.MD.C.6 3.NBT.A.2 3.MD.B.4	⚡ 140 XP	Launch →
Grade 4	Place value ×10, area formula, distance problems & fraction plots	4.NBT.A.1 4.MD.A.3 4.MD.A.2 4.MD.B.4	⚡ 150 XP	Launch →
Grade 5	Powers of place value, fraction problems, rounding decimals & line plots	5.NBT.A.1 5.NF.B.6 5.NBT.A.4 5.MD.B.2	⚡ 160 XP	Launch →

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Every Common Core standard in this case

Across K–5, The Blooming Bandit covers these 24 standards. Mastery is tracked per standard for each agent. Official Common Core wording:

1.MD.A.1	Order three objects by length; compare the lengths of two objects indirectly by using a third object.
1.NBT.B.2	Understand that the two digits of a two-digit number represent amounts of tens and ones.
1.NBT.C.4	Add within 100, including adding a two-digit number and a one-digit number, and adding a two-digit number and a multiple of 10, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used. Understand that in adding two-digit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten.
1.OA.C.5	Relate counting to addition and subtraction (e.g., by counting on 2 to add 2).
2.G.A.2	Partition a rectangle into rows and columns of same-size squares and count to find the total number of them.
2.MD.B.6	Represent whole numbers as lengths from 0 on a number line diagram with equally spaced points corresponding to the numbers 0, 1, 2, …, and represent whole-number sums and differences within 100 on a number line diagram.
2.MD.D.9	Generate measurement data by measuring lengths of several objects to the nearest whole unit, or by making repeated measurements of the same object. Show the measurements by making a line plot, where the horizontal scale is marked off in whole-number units.
2.NBT.A.1	Understand that the three digits of a three-digit number represent amounts of hundreds, tens, and ones; e.g., 706 equals 7 hundreds, 0 tens, and 6 ones.
3.MD.B.4	Generate measurement data by measuring lengths using rulers marked with halves and fourths of an inch. Show the data by making a line plot, where the horizontal scale is marked off in appropriate units — whole numbers, halves, or quarters.
3.MD.C.6	Measure areas by counting unit squares (square cm, square m, square in, square ft, and improvised units).
3.NBT.A.2	Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.
3.OA.A.2	Interpret whole-number quotients of whole numbers, e.g., interpret 56 ÷ 8 as the number of objects in each share when 56 objects are partitioned equally into 8 shares, or as a number of shares when 56 objects are partitioned into equal shares of 8 objects each.
4.MD.A.2	Use the four operations to solve word problems involving distances, intervals of time, liquid volumes, masses of objects, and money, including problems involving simple fractions or decimals, and problems that require expressing measurements given in a larger unit in terms of a smaller unit. Represent measurement quantities using diagrams such as number line diagrams that feature a measurement scale.
4.MD.A.3	Apply the area and perimeter formulas for rectangles in real world and mathematical problems.
4.MD.B.4	Make a line plot to display a data set of measurements in fractions of a unit (1/2, 1/4, 1/8). Solve problems involving addition and subtraction of fractions by using information presented in line plots.
4.NBT.A.1	Recognize that in a multi-digit whole number, a digit in one place represents ten times what it represents in the place to its right.
5.MD.B.2	Make a line plot to display a data set of measurements in fractions of a unit (1/2, 1/4, 1/8). Use operations on fractions for this grade to solve problems involving information presented in line plots.
5.NBT.A.1	Recognize that in a multi-digit number, a digit in one place represents 10 times as much as it represents in the place to its right and 1/10 of what it represents in the place to its left.
5.NBT.A.4	Use place value understanding to round decimals to any place.
5.NF.B.6	Solve real world problems involving multiplication of fractions and mixed numbers, e.g., by using visual fraction models or equations to represent the problem.
K.CC.A.2	Count forward beginning from a given number within the known sequence (instead of having to begin at 1).
K.CC.B.5	Count to answer "how many?" questions about as many as 20 things arranged in a line, a rectangular array, or a circle, or as many as 10 things in a scattered configuration; given a number from 1—20, count out that many objects.
K.MD.A.2	Directly compare two objects with a measurable attribute in common, to see which object has "more of"/"less of" the attribute, and describe the difference.
K.NBT.A.1	Compose and decompose numbers from 11 to 19 into ten ones and some further ones, e.g., by using objects or drawings, and record each composition or decomposition by a drawing or equation (e.g., 18 = 10 + 8); understand that these numbers are composed of ten ones and one, two, three, four, five, six, seven, eight, or nine ones.

Questions parents and teachers ask

Why does a garden teach multiplication?

Because a flower bed laid out in rows and columns IS an array, and an array is what multiplication actually means. Children who meet arrays early tend to find times tables less arbitrary later.

Is this a good first paid case?

It's a strong one, particularly for Grades 2–4, because it links place value, arrays, area and data — four things usually taught separately — inside one story.

It's the newest — is it finished?

Yes. It's complete at all six grades, K through 5, with verified Common Core standards at each level. The standards are listed in full on this page.