# Academic standards list

### First Grade — Mathematics

### Introduction

Academic standards define the expectations for knowledge and skills that students are to learn in a subject by a certain age or at the end of a school grade level. This page contains a list of standards for a specific content area, grade level, and/or course. The list of standards may be structured using categories and sub-categories.

### Operations and Algebraic Thinking

TSS.Math.1.OA

Represent and solve problems involving addition and subtraction.

Add and subtract within 20 to solve contextual problems, with unknowns in all positions, involving situations of add to, take from, put together/take apart,…

Add three whole numbers whose sum is within 20 to solve contextual problems using objects, drawings, and equations with a symbol for the unknown number to…

Understand and apply properties of operations and the relationship between addition and subtraction.

Apply properties of operations (additive identity, commutative, and associative) as strategies to add and subtract. (Students need not use formal terms for…

Understand subtraction as an unknown-addend problem. For example, to solve 10 - 8 = ___, a student can use 8 + ___ = 10.

Add and subtract within 20.

Add and subtract within 20 using strategies such as counting on, counting back, making 10, using fact families and related known facts, and composing/…

Fluently add and subtract within 20 using mental strategies. By the end of 1 st grade, know from memory all sums up to 10.

Work with addition and subtraction equations.

Understand the meaning of the equal sign (e.g., 6 = 6; 5 + 2 = 4 + 3; 7 = 8 - 1). Determine if equations involving addition and subtraction are true or false.

Determine the unknown whole number in an addition or subtraction equation, with the unknown in any position (e.g., 8 + ? = 11, 5 = ? - 3, 6 + 6 = ?).

### Number and Operations in Base Ten

TSS.Math.1.NBT

Extend the counting sequence.

Count to 120, starting at any number. Read and write numerals to 120 and represent a number of objects with a written numeral. Count backward from 20.

Understand place value.

Know that the digits of a two-digit number represent groups of tens and ones (e.g., 39 can be represented as 39 ones, 2 tens and 19 ones, or 3 tens and 9…

Compare two two-digit numbers based on the meanings of the digits in each place and use the symbols >, =, and

Use place value understanding and properties of operations to add and subtract.

Add a two-digit number to a one-digit number and a two-digit number to a multiple of ten (within 100). Use concrete models, drawings, strategies based on…

Mentally find 10 more or 10 less than a given two-digit number without having to count by ones and explain the reasoning used.

Subtract multiples of 10 from multiples of 10 in the range 10-90 using concrete models, drawings, strategies based on place value, properties of…

### Measurement and Data

TSS.Math.1.MD

Measure lengths indirectly and by iterating length units.

Order three objects by length. Compare the lengths of two objects indirectly by using a third object. For example, to compare indirectly the heights of Bill…

Measure the length of an object using non-standard units and express this length as a whole number of units.

Work with time and money.

Represent and interpret data.

Organize, represent, and interpret data with up to three categories. Ask and answer questions about the total number of data points, how many in each… ♦

### Geometry

TSS.Math.1.G

Reason about shapes and their attributes.

Distinguish between attributes that define a shape (e.g., number of sides and vertices) versus attributes that do not define the shape (e.g., color,… ♦

Create a composite shape and use the composite shape to make new shapes by using two-dimensional shapes (rectangles, squares, trapezoids, triangles,… ♦

♦ Academic Standards marked with a diamond are "

*Supporting Content*" within the grade level or course.

**This website provides a reference tool for browsing academic standards and locating associated resources. We are not the originator of these academic standards. Although we strive to maintain accuracy, there may be revisions, updates, or errors within the text and structure of the information displayed. In case of any discrepancy, please respect the originator's published version (https://www.tn.gov/content/dam/tn/stateboardofeducation/documents/massivemeetingsfolder/meetingfiles4/10-20-17_III_J_Non-Substantive_Chanages_to_Math_ELA__Science_Standards_Attachment_1_-_Math.pdf) as the definitive record.**

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