How to learn Grade 1: Mathematics

Oregon academic standards: Mathematics, Grade 1

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1. Grade 1 · Analyze, represent, and interpret data.

Sorting into categories (age 6+): 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

Telling Time: Hours and Half Hours: Tell the time to the hour and half past the hour, and draw clock hands to show these times
Telling Time: Minutes: Tell and write the time to five minutes, including quarter past and quarter to, and draw clock hands to show these times
Telling time to the minute (age 7+): 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

Measurable Attributes of Objects: Describe and identify measurable attributes of objects such as length, height, weight, and capacity; use comparative language (longer, shorter, heavier, lighter, more, less)
Measuring length: Order three objects by length and compare the lengths of two objects indirectly using a third object

Splitting shapes into equal parts (age 7+): 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
Composing Shapes: Compose two-dimensional shapes (rectangles, squares, trapezoids, triangles, half-circles, quarter-circles) to create composite shapes, and compose new shapes from the composite shape
Angles in triangles (age 6+): Distinguish defining attributes of shapes (e.g. triangles are closed and three-sided) from non-defining attributes (e.g. colour, orientation, overall size)

Subtracting multiples of 10: Subtract multiples of 10 (10–90) from multiples of 10 using place value strategies
Place value understanding and number facts: Use place value understanding and number facts to solve problems
Addition and subtraction strategies (age 7+): Explain why addition and subtraction strategies work, using place value and the properties of operations
Adding within 100: Add within 100 using strategies based on place value, including adding a two-digit and one-digit number, and a two-digit and a multiple of 10
Addition and subtraction within 1000: Add and subtract within 1000 using concrete models, drawings, and strategies based on place value; understand composing and decomposing tens and hundreds

Comparing and ordering numbers: Compare and order two-digit numbers using the symbols >, =, and <, based on place value understanding
A Ten Is Ten Ones: Understand that 10 can be thought of as a bundle of ten ones — called a 'ten'
A Hundred Is Ten Tens: Understand that 100 can be thought of as a bundle of ten tens — called a 'hundred'

Reading and writing numbers to 120: Count to 120 starting at any number less than 120; read and write numerals to 120

What the equals sign means: Understand the meaning of the equal sign as 'is the same as' and determine if equations are true or false
Unknown in Addition & Subtraction: Determine the unknown whole number in an addition or subtraction equation relating three whole numbers

Fluent adding and subtracting within 10: Fluently add and subtract within 10
Fluent adding and subtracting within 20: Fluently add and subtract within 20 using mental strategies; know from memory all sums of two one-digit numbers
Adding and subtracting: Add and subtract one-digit and two-digit numbers to 20, including zero

Finding a missing number in addition: Understand subtraction as finding an unknown addend (e.g. 10 − 8 = ? is the same as 8 + ? = 10)

Addition and subtraction word problems: Solve addition and subtraction word problems within 10 using objects or drawings