Math: Exploring Fractional Parts

Representing and Counting Fractional Parts (Models, Pictures, and Words – No Fraction Notation)

• 2.3B explain that the more fractional parts used to make a whole, the smaller the part; and the fewer the fractional parts, the larger the part
  • 2.3A partition objects into equal parts and name the parts, including halves, fourths, and eighths, using words
  • 2.3C use concrete models to count fractional parts beyond one whole using words and recognize how many parts it takes to equal one whole
  • 2.3D identify examples and non-examples of halves, fourths, and eighths

Counting Patterns (Suggested: 3 days)

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

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

Measuring Length (Suggested: 13 days)

• 2.9A find the length of objects using concrete models for standard units of length
• 2.9B describe the inverse relationship between the size of the unit and the number of units needed to equal the length of an object
• 2.9C represent whole numbers as distances from any given location on a number line
• 2.9D determine the length of an object to the nearest marked unit using rulers, yardsticks, meter sticks, or measuring tapes
• 2.9E determine a solution to a problem involving length, including estimating lengths

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.