The first unit revisits and extends addition and subtraction within 20, helping to ensure that second graders operate with understanding and fact fluency from the start of the school year.
Units 2, 3, 5, and parts of Unit 7, are devoted to place value and multi-digit addition and subtraction. During these units, students learn to count by fives, tens, and multiples of hundreds, tens and ones; read, write, and compare numbers to 1,000; and develop fluency with addition and subtraction to 100 as they solve and pose a wide variety of word problems. Later in the year, the children use concrete models and sketches, as well as strategies based on place value, properties of operations, and the relationship between addition and subtraction, to add and subtract to 1,000.
Unit 6 revolves around geometry, building foundations for understanding area, volume, congruence, similarity, and symmetry as students investigate, describe, build, draw, combine, decompose, and analyze two- and three-dimensional shapes.
Unit 4, and the first part of Unit 7, focus on linear measurement, as students construct their own rulers; estimate and measure in inches, feet, yards, centimeters, and meters; and solve problems that involve adding, subtracting, and comparing lengths.
Unit 8 revisits linear measurement in the context of science and engineering as students make and test cardboard ramps of different kinds to investigate some of the factors that cause marbles to roll farther and faster. In the process, they generate data by measuring marble roll distances multiple times, pool their data, and enter it on line plots to better see, understand, and analyze how manipulating the different variables affects the outcomes.
Content Outline and Samples
Figure the Facts
- Sorting & Graphing
- Number Facts with the Number Rack
- Introducing Addition & Subtraction Strategies
- Fluency with Addition Facts to Twenty
Place Value & Measurement with Jack's Beanstalks
- Counting & Modeling Two- & Three-Digit Numbers
- Measuring Jack’s Giant Beans with Tens
- Adding on the Open Number Line
- Thinking in Twos
- Inches & Feet
- Inches, Feet & Yards
- Proportion & Fractions with a Giant
- Thinking in Threes
- Attributes of Two-Dimensional Shapes
- Exploring Area & Arrays
- Composing & Decomposing Patchwork Shapes
- Patchwork Fractions
Measurement, Fractions & Multi-Digit Computation with Hungry Ants
- Army Ants: Length in Metric Units
- Ant Treats: Division & Fractions
- Adding & Subtracting Three-Digit Numbers
- Writing & Solving Story Problems
Measurement, Data & Multi-Digit Computation with Marble Rolls
- Revisiting Place Value & Three-Digit Computation
- Building Marble Rolls & Collecting Data
- Collecting & Analyzing More Marble Roll Data
- Student-Conducted Surveys
- Calendar Grid
- Calendar Collector
- Daily Rectangle
- Computational Fluency
- Number Line