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## Oklahoma Math Standards - 2nd Grade

MathScore aligns to the Oklahoma Math Standards for 2nd Grade. The standards appear below along with the MathScore topics that match. If you click on a topic name, you will see sample problems at varying degrees of difficulty that MathScore generated. When students use our program, the difficulty of the problems will automatically adapt based on individual performance, resulting in not only true differentiated instruction, but a challenging game-like experience.

View the Oklahoma Math Standards at other levels.

## Algebraic Reasoning

Standard 1 Algebraic Reasoning: Patterns and Relationships - The student will use a variety of problem-solving approaches to model, describe and extend patterns.
1. Describe, extend, and create patterns using symbols, shapes, or designs (e.g., repeating and growing patterns made up of sets of shapes or designs, create patterns by combining different shapes and taking them apart). (Patterns: Numbers , Patterns: Shapes )
2. Formulate and record generalizations about number patterns in a variety of situations (e.g., addition and subtraction patterns, even and odd numbers, build a table showing the cost of one pencil at 10 cents, 2 pencils at 20 cents). (Odd or Even , Function Tables , Function Tables 2 )
3. Find unknown values in open number sentences with a missing addend and use to solve everyday problems. (Missing Term , Basic Word Problems )
4. Recognize and apply the associative property of addition (e.g., 3 + (2 +1) = (3 + 2) + 1). (Associative Property 1 )

## Number Sense and Operations

Standard 2 Number Sense and Operation - The student will use numbers and number relationships to acquire basic facts and will compute with whole numbers less than 100.
1. Number Sense
a. Use concrete models of hundreds, tens, and ones to develop the concepts of place value and link the concepts to the reading and writing of numbers (e.g., base-10 blocks). (Counting Squares )
b. Represent a number in a variety of ways (e.g., write 15 as 8 + 7, write 25 as 2 tens + 5 ones or as 1 ten + 15 ones). (Place Value to 1000 )
c. Write a number sentence to compare numbers less than 1,000 (e.g., 425 > 276, 73 < 107, page 351 comes after 350, 753 is between 700 and 800). (Order Numbers to 1000 )
d. Demonstrate (using concrete objects, pictures, and numerical symbols) fractional parts including halves, thirds, fourths and common percents (25%, 50%, 75%, and 100%). (Fraction Pictures )
2. Number Operations
a. Demonstrate fluency (i.e., memorize and apply) with basic addition facts to make a maximum sum of 18 and the associated subtraction facts (e.g., 15+3=18 and 18-3=15). (Fast Addition , Fast Addition Reverse , Fast Subtraction , Missing Term , Basic Word Problems , Mixed Addition and Subtraction )
b. Use strategies to estimation and solve sums and differences (e.g., compose, decompose and regroup numbers, use knowledge of 10 to estimate quantities and sums [two numbers less than 10 cannot add up to more than 20].) (Rounding Numbers , Estimated Addition , Estimated Subtraction )
c. Solve two-digit addition and subtraction problems with and without regrouping using a variety of techniques. (Long Addition to 1000 , Basic Addition to 1000 , Basic Subtraction to 1000 , Long Subtraction to 1000 )
d. Use concrete models to develop understanding of multiplication as repeated addition and division as successive subtraction. (Understanding Multiplication , Understanding Division )

## Geometry

Standard 3 Geometry - The student will use geometric properties and relationships to recognize and describe shapes.
1. Identify symmetric and congruent shapes and figures. (Congruent And Similar Triangles )
2. Investigate and predict the results of putting together and taking apart two- dimensional shapes.

## Measurement

Standard 4 Measurement - The student will use appropriate units of measure in a variety of situations.
1. Linear Measurement
a. Measure objects using standard units (e.g., measure length to the nearest foot, inch, and half inch).
b. Select and use appropriate units of measurement in problem solving and everyday situations.
2. Time
a. Tell time on digital and analog clocks on the quarter-hour. (Telling Time )
b. Solve problems involving number of days in a week, month, or year and problems involving weeks in a month and year. (Time Conversion )
3. Money
a. Identify and count money up to a twenty dollar bill. (Counting Money )
b. Recognize and write different amounts of money using dollar and cent notation. (Making Change 2 , Counting Money )

## Data Analysis

Standard 5 Data Analysis - The student will demonstrate an understanding of data collection, display, and interpretation.
1. Data Analysis
a. Collect, sort, organize, and display data in charts, bar graphs, and tables (e.g., collect data on teeth lost and display results in a chart).
b. Summarize and interpret data in charts, bar graphs, and tables. (Tally and Pictographs , Bar Graphs )   