# Grade 2: Mathematics A course roadmap (maths). Language: en. By @si. Licence: CC BY-SA 4.0. 0 of 20 concepts ready. In the app: https://ai.page/roadmap/me-grade-2 Part of: [Maine: Mathematics](https://ai.page/roadmap/me.md) Goal: Maine academic standards: Mathematics, Grade 2 ## 1. Statistical Reasoning · 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 ## 2. Statistical Reasoning · 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 ## 3. Statistical Reasoning · Represent and interpret data. - [Picture & Bar Graphs](https://ai.page/c/picture-and-bar-graphs/index.md): Draw a picture graph and a bar graph (with single-unit scale) to represent a data set with up to four categories; solve put-together, take-apart, and compare problems using information presented in a bar graph - [Measuring & Plotting Lengths](https://ai.page/c/measuring-and-plotting-lengths/index.md): Generate measurement data by measuring lengths to the nearest whole unit and display the data on a line plot ## 4. Statistical Reasoning · Describe and compare measurable attributes. - [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 - [Estimating Lengths](https://ai.page/c/estimating-lengths/index.md): Estimate lengths using units of inches, feet, centimetres, and metres - [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 - [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 - [Measurable Attributes of Objects](https://ai.page/c/measurable-attributes-of-objects/index.md): Describe and identify measurable attributes of objects such as length, height, weight, and capacity; use comparative language (longer, shorter, heavier, lighter, more, less) ## 5. Geometric Reasoning · Identify, describe, analyze, compare, create, and compose shapes based on their attributes. - [Halves & Quarters of Shapes](https://ai.page/c/halves-and-quarters-of-shapes/index.md): Partition circles and rectangles into two and four equal shares and describe them using the words halves, fourths, and quarters - [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 - [Angles in triangles (age 6+)](https://ai.page/c/angles-in-triangles-age-6/index.md): Distinguish defining attributes of shapes (e.g. triangles are closed and three-sided) from non-defining attributes (e.g. colour, orientation, overall size) - [Angles in triangles (age 7+)](https://ai.page/c/angles-in-triangles-age-7/index.md): Recognise and draw shapes having specified attributes (e.g. a given number of angles or equal faces); identify triangles, quadrilaterals, pentagons, hexagons, and cubes - [Edges, vertices, and faces](https://ai.page/c/edges-vertices-and-faces/index.md): Identify and describe properties of 3-D shapes including the number of edges, vertices, and faces ## 6. Algebraic Reasoning · Understand and apply properties of operation and the relationship between addition and subtraction within 20. - [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 - [Fluent adding and subtracting within 20](https://ai.page/c/fluent-adding-and-subtracting-within-20/index.md): Fluently add and subtract within 20 using mental strategies; know from memory all sums of two one-digit numbers ## 7. Algebraic Reasoning · Understand addition as putting together and adding to, and understand subtraction as taking apart and taking from. - [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 ## Health: 0 of 100 Of its 20 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): - 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 - Picture & Bar Graphs has no explanation yet - Measuring & Plotting Lengths comes before Measuring length (age 7+), which it needs - Measuring & Plotting Lengths has no explanation yet - Measuring length (age 7+) has no explanation yet - Estimating Lengths has no explanation yet - Measuring with different units has no explanation yet - Comparing lengths by measuring has no explanation yet - Measurable Attributes of Objects has no explanation yet - Halves & Quarters of Shapes 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 - Angles in triangles (age 6+) has no explanation yet - Angles in triangles (age 7+) has no explanation yet - Edges, vertices, and faces has no explanation yet - Arrays for multiplication (age 7+) has no explanation yet - Odd or Even has no explanation yet - Fluent adding and subtracting within 20 has no explanation yet - Two-Step Word Problems has no explanation yet Credit: The structure of Maine academic standards: Mathematics (http://www.maine.gov/doe/sites/maine.gov.doe/files/2020-07/1.%20Mathematics%20Standards%202%2018%202020.docx); 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.