Joining and Separating Equal Groups

Joining and Separating Equal Groups

• 2.6 The student applies mathematical process standards to connect repeated addition and subtraction to multiplication and division situations that involve equal groupings and shares.
  • 2.6A model, create, and describe contextual multiplication situations in which equivalent sets of concrete objects are joined
  • 2.6B model, create, and describe contextual division situations in which a set of concrete objects is separated into equivalent sets

Analyzing Numbers

• 2.7A determine whether a number up to 40 is even or odd using pairings of objects to represent the number

Counting Patterns (Suggested: 3 days)

• RRISD 2.7B Skip count forward and backward by ten and one hundred from any given number up to 1,000

Developing Strategies for Adding and Subtracting (Suggested: 10 days)

• 2.4A recall basic facts to add and subtract within 20 with automaticity
• 2.4B add up to four two-digit numbers and subtract two-digit numbers using mental strategies and algorithms based on knowledge of place value and properties of operations

Data Analysis (Suggested: 13 days)

• 2.10C write and solve one-step word problems involving addition or subtraction using data represented within pictographs and bar graphs with intervals of one
  • 2.10A explain that the length of a bar in a bar graph or the number of pictures in a pictograph represents the number of data points for a given category
  • 2.10B organize a collection of data with up to four categories using pictographs and bar graphs with intervals of one or more
  • 2.10D draw conclusions and make predictions from information in a graph

Counting Quantities (Suggested: 2 days, using both numeracy and spiral review time)

• RRISD 2.1 organize and count a collection of objects and create a recording of how the objects were counted
  • 2.1C  select tools, including real objects, manipulatives, paper and pencil, and technology as appropriate, and techniques, including mental math, estimation, and number sense as appropriate, to solve problems;
  • 2.1E  create and use representations to organize, record, and communicate mathematical ideas;

• Counting Coins (Make this the focus on 1 day of Counting Collections)

  • 2.5A determine the value of a collection of coins up to one dollar
    • 2.5B use the cent symbol, dollar sign, and the decimal point to name the value of a collection of coins

Telling Time (Ongoing)

• 2.9G read and write time to the nearest one-minute increment using analog and digital clocks and distinguish between a.m. and p.m.