# Inside Mathematics

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- algebra
- fractions
- geometry
- numbers

- analyzing evidence
- applying information
- problem solving
- thinking critically

###### Pros

Free lesson videos and worksheets provide excellent support for math teachers.###### Cons

The resources provide guidance for teaching a concept, but formal curricula with written lesson plans are not provided.###### Bottom Line

An excellent, free resource for educators who need support and inspiration for teaching and addressing CCSS and mathematical practices.None

Most resources are engaging and challenging, but the lower quality of some of the videos makes it difficult to see what the teachers are doing.

The resources tightly align with Common Core standards and practices while utilizing strategies for differentiated learning and options for using formative re-engaging lessons.

There are supportive resources for a range of educators, including teachers, coaches, and administrators; information is easy to find.

Teachers, coaches, and administrators can use Inside Mathematics as a support tool to help address a variety of issues or simply for inspiration. For teachers, search for videos or worksheets by grade or strand. Depending on what kind of support is needed, teachers can view a resource prior to initiating a lesson, show students a classroom video as a follow-up to a lesson, or include a student worksheet as part of a lesson plan. For coaches and administrators, there are numerous videos and handouts to help with issues such as classroom observations, developing teacher rubrics, interventions, and much more.

Read more Read lessInside Mathematics provides resources for grades K through 12. On the main page, users can search for resources by grade or strand. Resources are also organized into categories: tools for educators, classroom videos, Common Core resources, problems of the month, and performance assessment tasks.

Each category includes videos and/or printable documents that support the content indicated by the category, and some categories also include iBooks. For example, in classroom videos, users will find videos of teachers conducting classroom lessons with student engagement. In Common Core resources, there are a variety of resources that help educators implement standards and practices in the classroom. Navigation is easy, and information is very well organized.

Read more Read lessInside Mathematics was developed as an educators' tool, and students can use many of the resources as learning tools. The problems of the month include student-facing worksheets and are divided into five levels of difficulty to allow for access across all grades and for differentiated learning. There are numerous performance assessment tasks that align with Common Core standards, beginning with Grade 2. These tasks are formative assessments that require students to use higher-order thinking to demonstrate comprehension of a concept.

Inside Mathematics is a valuable resource for students and educators who need inspiration or help with lesson plans, assessments, remediation strategies, and more. Plus, it's free and easy to use!

Read more Read less## Key Standards Supported

## Expressions And Equations | |

6.EE: Apply And Extend Previous Understandings Of Arithmetic To Algebraic Expressions. | |

6.EE.2 | Write, read, and evaluate expressions in which letters stand for numbers. |

6.EE.2.b | Identify parts of an expression using mathematical terms (sum, term, product, factor, quotient, coefficient); view one or more parts of an expression as a single entity. For example, describe the expression 2 (8 + 7) as a product of two factors; view (8 + 7) as both a single entity and a sum of two terms. |

6.EE.4 | Identify when two expressions are equivalent (i.e., when the two expressions name the same number regardless of which value is substituted into them). For example, the expressions y + y + y and 3y are equivalent because they name the same number regardless of which number y stands for. |

Reason About And Solve One-Variable Equations And Inequalities. | |

6.EE.5 | Understand solving an equation or inequality as a process of answering a question: which values from a specified set, if any, make the equation or inequality true? Use substitution to determine whether a given number in a specified set makes an equation or inequality true. |

## Functions | |

8.F: Define, Evaluate, And Compare Functions. | |

8.F.1 | Understand that a function is a rule that assigns to each input exactly one output. The graph of a function is the set of ordered pairs consisting of an input and the corresponding output.1 |

8.F.3 | Interpret the equation y = mx + b as defining a linear function, whose graph is a straight line; give examples of functions that are not linear. For example, the function A = s2 giving the area of a square as a function of its side length is not linear because its graph contains the points (1,1), (2,4) and (3,9), which are not on a straight line. |

Use Functions To Model Relationships Between Quantities. | |

8.F.5 | Describe qualitatively the functional relationship between two quantities by analyzing a graph (e.g., where the function is increasing or decreasing, linear or nonlinear). Sketch a graph that exhibits the qualitative features of a function that has been described verbally. |

## Geometry | |

8.G: Understand Congruence And Similarity Using Physical Models, Trans- Parencies, Or Geometry Software. | |

8.G.2 | Understand that a two-dimensional figure is congruent to another if the second can be obtained from the first by a sequence of rotations, reflections, and translations; given two congruent figures, describe a sequence that exhibits the congruence between them. |

Understand And Apply The Pythagorean Theorem. | |

8.G.7 | Apply the Pythagorean Theorem to determine unknown side lengths in right triangles in real-world and mathematical problems in two and three dimensions. |

8.G.8 | Apply the Pythagorean Theorem to find the distance between two points in a coordinate system. |

## Linear, Quadratic, And Exponential Models | |

HSF.LE: Construct And Compare Linear, Quadratic, And Exponential Models And Solve Problems | |

HSF.LE.1 | Distinguish between situations that can be modeled with linear functions and with exponential functions. |

HSF.LE.3 | Observe using graphs and tables that a quantity increasing exponentially eventually exceeds a quantity increasing linearly, quadratically, or (more generally) as a polynomial function. |

## Number And Operations In Base Ten | |

1.NBT: Understand Place Value. | |

1.NBT.2 | Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases: |

4.NBT: Use Place Value Understanding And Properties Of Operations To Perform Multi-Digit Arithmetic. | |

4.NBT.5 | Multiply a whole number of up to four digits by a one-digit whole number, and multiply two two-digit numbers, using strategies based on place value and the properties of operations. Illustrate and explain the calculation by using equations, rectangular arrays, and/or area models. |

4.NBT.6 | Find whole-number quotients and remainders with up to four-digit dividends and one-digit divisors, using strategies based on place value, the properties of operations, and/or the relationship between multiplication and division. Illustrate and explain the calculation by using equations, rectangular arrays, and/or area models. |

## Number And Operations—Fractions | |

3.NF: Develop Understanding Of Fractions As Numbers. | |

3.NF.1 | Understand a fraction 1/b as the quantity formed by 1 part when a whole is partitioned into b equal parts; understand a fraction a/b as the quantity formed by a parts of size 1/b. |

5.NF: Use Equivalent Fractions As A Strategy To Add And Subtract Fractions. | |

5.NF.1 | Add and subtract fractions with unlike denominators (including mixed numbers) by replacing given fractions with equivalent fractions in such a way as to produce an equivalent sum or difference of fractions with like denominators. For example, 2/3 + 5/4 = 8/12 + 15/12 = 23/12. (In general, a/b + c/d = (ad + bc)/bd.) |

5.NF.2 | Solve word problems involving addition and subtraction of fractions referring to the same whole, including cases of unlike denominators, e.g., by using visual fraction models or equations to represent the problem. Use benchmark fractions and number sense of fractions |

Apply And Extend Previous Understandings Of Multiplication And Division To Multiply And Divide Fractions. | |

5.NF.3 | Interpret a fraction as division of the numerator by the denominator (a/b = a ÷ b). Solve word problems involving division of whole numbers leading to answers in the form of fractions or mixed numbers, e.g., by using visual fraction models or equations to represent the problem. For example, interpret 3/4 as the result of dividing 3 by 4, noting that 3/4 multiplied by 4 equals 3, and that when 3 wholes are shared equally among 4 people each person has a share of size 3/4. If 9 people want to share a 50-pound sack of rice equally by weight, how many pounds of rice should each person get? Between what two whole numbers does your answer lie? |

5.NF.4.a | Interpret the product (a/b) × q as a parts of a partition of q into b equal parts; equivalently, as the result of a sequence of operations a × q ÷ b. For example, use a visual fraction model to show (2/3) × 4 = 8/3, and create a story context for this equation. Do the same with (2/3) × (4/5) = 8/15. (In general, (a/b) × (c/d) = ac/bd.) |

5.NF.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. |

## Operations And Algebraic Thinking | |

1.OA: Add And Subtract Within 20. | |

1.OA.6 | Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13). |

3.OA: Understand Properties Of Multiplication And The Relationship Between Multiplication And Division. | |

3.OA.5 | Apply properties of operations as strategies to multiply and divide.2 Examples: If 6 × 4 = 24 is known, then 4 × 6 = 24 is also known. (Commutative property of multiplication.) 3 × 5 × 2 can be found by 3 × 5 = 15, then 15 × 2 = 30, or by 5 × 2 = 10, then 3 × 10 = 30. (Associative property of multiplication.) Knowing that 8 × 5 = 40 and 8 × 2 = 16, one can find 8 × 7 as 8 × (5 + 2) = (8 × 5) + (8 × 2) = 40 + 16 = 56. (Distributive property.) |

3.OA.6 | Understand division as an unknown-factor problem. For example, find 32 ÷ 8 by finding the number that makes 32 when multiplied by 8. |

5.OA: Analyze Patterns And Relationships. | |

5.OA.3 | Generate two numerical patterns using two given rules. Identify apparent relationships between corresponding terms. Form ordered pairs consisting of corresponding terms from the two patterns, and graph the ordered pairs on a coordinate plane. For example, given the rule “Add 3” and the starting number 0, and given the rule “Add 6” and the starting number 0, generate terms in the resulting sequences, and observe that the terms in one sequence are twice the corresponding terms in the other sequence. Explain informally why this is so. |

## Ratios And Proportional Relationships | |

6.RP: Understand Ratio Concepts And Use Ratio Reasoning To Solve Problems. | |

6.RP.2 | Understand the concept of a unit rate a/b associated with a ratio a:b with b ≠ 0, and use rate language in the context of a ratio relationship. For example, “This recipe has a ratio of 3 cups of flour to 4 cups of sugar, so there is 3/4 cup of flour for each cup of sugar.” “We paid $75 for 15 hamburgers, which is a rate of $5 per hamburger.”1 |

6.RP.3 | Use ratio and rate reasoning to solve real-world and mathematical problems, e.g., by reasoning about tables of equivalent ratios, tape diagrams, double number line diagrams, or equations. |