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Collection of common core math explained (32)
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Visual comparison of the standard subtraction algorithm versus the Common Core number line strategy.
Visual examples of Common Core Math strategies showing how students learn addition, subtraction, and division through number lines and grouping models.
This visual comparison demonstrates how the traditional multiplication algorithm and Common Core's box method both arrive at the same answer using different strategies.
Visual comparison of traditional subtraction versus the "New Math" Common Core method, highlighting concerns about textbook publisher profits.
Side-by-side comparison showing the step-by-step logic behind Common Core math versus traditional vertical algorithms.
This visual demonstrates vertical alignment by showing how the area model used for 24x35 in elementary school evolves into polynomial multiplication in secondary math.
Visual breakdown of the counting-up subtraction method, demonstrating how to find the difference between 325 and 38 by adding increments.
This worksheet asks students to choose the ten-frame model that correctly shows how to subtract 8 from 14 by making a ten.
This graphic illustrates the difference between the traditional subtraction algorithm and the 'new' method which uses addition to find the difference.
Student's math journal displaying a solved addition problem on the left and a blank subtraction template on the right.
Handwritten math diagram demonstrating the "New Way" subtraction method for 243 minus 87 using a number line and addition strategy.
Side-by-side comparison of the traditional longform multiplication method and the Common Core box method.
This image highlights a confusing math worksheet where the table headers for "10 times as much as" were interpreted differently by the student than the answer key intended.
Student's math worksheet showing multiple incorrect answers on fraction subtraction problems, with a teacher's note at the top instructing them to "Do over using pictures!"
This example demonstrates breaking apart the number 17 to easily add it to 26 by creating a round number first.
Side-by-side comparison showing the procedural "Keep, Change, Flip" method versus the conceptual visual model for dividing 4 by 1/3.
This worksheet demonstrates the "making a ten" strategy for addition, breaking 17 into 4 and 13 to simplify the calculation of 26 + 17.
Teacher's guide helping parents navigate the shift in math terminology and problem-solving strategies introduced by Common Core standards.
Visual example from the book showing a ratio lesson where students compare two triangles to three circles on an interactive whiteboard.
This visual breakdown shows how to multiply 27 by 16 using the standard algorithm, demonstrating how to handle carrying, create partial products, and add them together for the final answer.
This chart contrasts the "old way" of vertical subtraction with the "Common Core way" of adding up to find the difference.
This diagram illustrates the "counting up" method for subtraction, breaking the distance between 87 and 243 into manageable chunks like 3, 10, 100, and 43 to find the total difference.
Side-by-side comparison of Net Worth Statements for clients Angelina and Brad, featuring fictional assets and debts.
Handwritten math problem showing the simple "old fashion" subtraction method alongside the more complex "new way" addition steps.
Parent with an engineering degree pens a sarcastic letter explaining why traditional subtraction beats Common Core's number line approach
Student's completed Daily Math Review sheet demonstrating skills in addition, area calculation, and number line jumps.