# Grade 2: Mathematics A course roadmap (maths). Language: en. By @si. Licence: CC BY-SA 4.0. 0 of 29 concepts ready. In the app: https://ai.page/roadmap/or-grade-2 Part of: [Oregon: Mathematics](https://ai.page/roadmap/or.md) Goal: Oregon academic standards: Mathematics, Grade 2 ## 1. Grade 2 · Analyze, represent, and interpret data. - [Sorting into categories (age 6+)](https://ai.page/c/sorting-into-categories-age-6/index.md): Interpret categorical data by asking and answering questions about totals, how many in each category, and how many more or less one category has than another ## 2. Grade 2 · Work with time and money. - [Halves and quarters (age 7+)](https://ai.page/c/halves-and-quarters-age-7/index.md): Solve word problems involving dollar bills, quarters, dimes, nickels, and pennies, using $ and ¢ symbols appropriately - [Telling time to the minute (age 7+)](https://ai.page/c/telling-time-to-the-minute-age-7/index.md): Tell and write time from analogue and digital clocks to the nearest five minutes, using a.m., p.m., and 12-hour and 24-hour notation ## 3. Grade 2 · Relate addition and subtraction to length. - [Numbers on a number line](https://ai.page/c/numbers-on-a-number-line/index.md): Represent whole numbers as lengths on a number line and represent sums and differences within 100 on a number line diagram - [Addition and subtraction word problems](https://ai.page/c/addition-and-subtraction-word-problems-2/index.md): Solve word problems involving lengths within 100, using addition and subtraction with drawings and equations ## 4. Grade 2 · Measure and estimate lengths in standard units. - [Measuring length (age 6+)](https://ai.page/c/measuring-length-age-6/index.md): Measure the length of an object using same-size length units laid end to end with no gaps or overlaps - [Measuring length (age 7+)](https://ai.page/c/measuring-length-age-7/index.md): Measure the length of an object by selecting and using appropriate tools such as rulers, yardsticks, metre sticks, and measuring tapes - [Comparing lengths by measuring](https://ai.page/c/comparing-lengths-by-measuring/index.md): Measure to determine how much longer one object is than another, expressing the length difference in terms of a standard length unit - [Measuring with different units](https://ai.page/c/measuring-with-different-units/index.md): Measure the length of an object using two different length units and describe how the measurements relate to the size of the unit chosen - [Estimating Lengths](https://ai.page/c/estimating-lengths/index.md): Estimate lengths using units of inches, feet, centimetres, and metres ## 5. Grade 2 · Reason with shapes and their attributes. - [Splitting shapes into equal parts (age 7+)](https://ai.page/c/splitting-shapes-into-equal-parts-age-7/index.md): Partition circles and rectangles into two, three, or four equal shares; describe shares as halves, thirds, and fourths; recognise that equal shares of identical wholes need not have the same shape - [Rows & Columns in Rectangles](https://ai.page/c/rows-and-columns-in-rectangles/index.md): Partition a rectangle into rows and columns of same-size squares and count to find the total number of them - [Understanding angles](https://ai.page/c/understanding-angles/index.md): Recognise angles as a property of shape or a description of a turn ## 6. Grade 2 · Use place value understanding and properties of operations to add and subtract. - [Fluent adding and subtracting within 100](https://ai.page/c/fluent-adding-and-subtracting-within-100/index.md): Fluently add and subtract within 100 using strategies based on place value, properties of operations, and the relationship between addition and subtraction - [Addition and subtraction strategies (age 7+)](https://ai.page/c/addition-and-subtraction-strategies-age-7/index.md): Explain why addition and subtraction strategies work, using place value and the properties of operations - [Place value understanding and number facts](https://ai.page/c/place-value-understanding-and-number-facts/index.md): Use place value understanding and number facts to solve problems - [Addition and subtraction within 1000](https://ai.page/c/addition-and-subtraction-within-1000/index.md): Add and subtract within 1000 using concrete models, drawings, and strategies based on place value; understand composing and decomposing tens and hundreds - [Adding numbers](https://ai.page/c/adding-numbers/index.md): Add up to four two-digit numbers using strategies based on place value and properties of operations ## 7. Grade 2 · Understand place value. - [Comparing and ordering numbers](https://ai.page/c/comparing-and-ordering-numbers/index.md): Compare and order two-digit numbers using the symbols >, =, and <, based on place value understanding - [A Hundred Is Ten Tens](https://ai.page/c/a-hundred-is-ten-tens/index.md): Understand that 100 can be thought of as a bundle of ten tens — called a 'hundred' - [The three digits of a three-digit number](https://ai.page/c/the-three-digits-of-a-three-digit-number/index.md): Understand that the three digits of a three-digit number represent amounts of hundreds, tens, and ones - [Ordering Numbers to 1000](https://ai.page/c/ordering-numbers-to-1000/index.md): Compare and order numbers up to 1000 using >, =, and < symbols, based on place-value understanding - [Reading and writing numbers (age 9+)](https://ai.page/c/reading-and-writing-numbers-age-9/index.md): Read, write, order, and compare whole numbers up to at least 1,000,000 using base-ten numerals, number names, expanded form, and place-value understanding - [Counting in 2s](https://ai.page/c/counting-in-2s/index.md): Count in multiples of 2, 5, and 10 (skip counting) - [The multiples of 100](https://ai.page/c/the-multiples-of-100/index.md): Understand that the multiples of 100 (100–900) each represent a number of hundreds with 0 tens and 0 ones ## 8. Grade 2 · Work with equal groups of objects to gain foundations for multiplication. - [Arrays for multiplication (age 7+)](https://ai.page/c/arrays-for-multiplication-age-7/index.md): Use addition to find the total number of objects arranged in rectangular arrays with up to 5 rows and 5 columns; write an equation to express the total as a sum of equal addends - [Odd or Even](https://ai.page/c/odd-or-even/index.md): Determine whether a group of objects (up to 20) has an odd or even number of members ## 9. Grade 2 · Represent and solve problems involving addition and subtraction. - [Two-Step Word Problems](https://ai.page/c/two-step-word-problems/index.md): Solve one- and two-step word problems within 100 using addition and subtraction, with unknowns in all positions - [Two-step addition and subtraction problems](https://ai.page/c/two-step-addition-and-subtraction-problems/index.md): Solve addition and subtraction two-step problems in contexts, deciding which operations and methods to use and why ## Health: 0 of 100 Of its 29 own concepts: 0 have an explanation, 0 have practice, 0 have a measurement question, 0 have a checked version. Findings (each is a task for anyone's AI): - Sorting into categories (age 6+) has no explanation yet - Halves and quarters (age 7+) comes before Fluent adding and subtracting within 100, which it needs - Halves and quarters (age 7+) has no explanation yet - Telling time to the minute (age 7+) has no explanation yet - Numbers on a number line has no explanation yet - Addition and subtraction word problems comes before Comparing lengths by measuring, which it needs - Addition and subtraction word problems has no explanation yet - Measuring length (age 6+) has no explanation yet - Measuring length (age 7+) has no explanation yet - Comparing lengths by measuring has no explanation yet - Measuring with different units has no explanation yet - Estimating Lengths has no explanation yet - Splitting shapes into equal parts (age 7+) has no explanation yet - Rows & Columns in Rectangles comes before Arrays for multiplication (age 7+), which it needs - Rows & Columns in Rectangles has no explanation yet - Understanding angles has no explanation yet - Fluent adding and subtracting within 100 has no explanation yet - Addition and subtraction strategies (age 7+) comes before The three digits of a three-digit number, which it needs - Addition and subtraction strategies (age 7+) has no explanation yet - Place value understanding and number facts has no explanation yet - Addition and subtraction within 1000 comes before The three digits of a three-digit number, which it needs - Addition and subtraction within 1000 has no explanation yet - Adding numbers has no explanation yet - Comparing and ordering numbers has no explanation yet - A Hundred Is Ten Tens has no explanation yet - The three digits of a three-digit number has no explanation yet - Ordering Numbers to 1000 has no explanation yet - Reading and writing numbers (age 9+) has no explanation yet - Counting in 2s has no explanation yet - The multiples of 100 has no explanation yet - Arrays for multiplication (age 7+) has no explanation yet - Odd or Even has no explanation yet - Two-Step Word Problems has no explanation yet - Two-step addition and subtraction problems has no explanation yet Credit: The structure of Oregon academic standards: Mathematics (https://www.oregon.gov/ode/educator-resources/standards/mathematics/Pages/MathStandards.aspx); concepts from the Marble Skill Taxonomy (v1), © Generative Spark, Inc. (withmarble.com), text CC BY-SA 4.0, database ODbL 1.0: https://github.com/withmarbleapp/os-taxonomy, mapped to its standards by Marble.