IXL Math - DoDEA second-grade math standards

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DoDEA

Skills available for DoDEA second-grade math standards

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2.M1 Numbers and Operations

2.M.1a use place value to represent whole numbers through 1000 using numerals, words, and physical models;
2.M.1b identify numbers as even or odd numbers and determine whether a set of objects has an odd or even number of elements;
2.M.1c show equivalent representations for whole numbers by using addition and subtraction facts;
2.M.1d explain and demonstrate addition and subtraction for two-digit numbers without regrouping, e.g., doubling, making jumps of ten, partial sums or differences, counting up or back;
2.M.1e explain and demonstrate addition and subtraction for two-digit numbers with regrouping, e.g., doubling, making jumps of ten, partial sums or differences, counting up or back;
2.M.1f estimate and verify answers in addition and subtraction problems with two-digit numbers;
- Properties: Solve inequalities using addition and subtraction shortcuts (Second grade - K.5)
- Estimation and rounding: Estimate sums (Second grade - N.5)
2.M.1g solve multi-step problems involving addition and subtraction;
2.M.1h count by twos, fives, and tens to 100;
2.M.1i model and demonstrate multiplication and division problems;
2.M.1j use words, numerals, and physical models to represent fractions and their relationship to the whole;

2.M2 Algebra

2.M.2a create and describe patterns with multiple attributes;
2.M.2b identify and extend a linear pattern by its rules;
2.M.2c use symbols to represent unknown quantities and identify values for symbols;
2.M.2d represent equivalence and extend the concept to situations involving symbols;
2.M.2e solve open sentences by representing an expression in more than one way using the associative property of addition;
2.M.2f model and describe a problem situation using symbols and operations;
2.M.2g describe qualitative changes;
2.M.2h describe quantitative changes, especially those involving addition and subtraction;

2.M3 Geometry

2.M.3a predict the results of putting together and taking apart two-dimensional shapes;
2.M.3b find and name locations using simple relationships and in coordinate systems, e.g., grids, maps;
- Data and graphs: Coordinate graphs (Second grade - R.1)
2.M.3c identify shapes that have been rotated (turned), reflected (flipped), and translated (slide). Describe direction of translations, e.g., left, right, down, up;
- Geometry: Flip, turn, and slide (Second grade - T.6)
2.M.3d identify and create shapes with symmetry;
- Geometry: Symmetry (Second grade - T.4)

2.M4 Measurement

2.M.4a tell time in five-minute intervals;
2.M.4b describe and compare relationships of time, e.g., minutes in an hour, hours in a day, days in a week, months in a year;
- Time: Relate time units (Second grade - Q.15)
2.M.4c decide which unit of measure is appropriate in a given situation;
- Time: Choose the appropriate time units (Second grade - Q.11)
2.M.4d make and use estimates of measurement, including time volume, weight, and area. Verify results;
2.M.4e use repetition of a single unit to measure something larger than the unit;

2.M5 Data Analysis and Probability

2.M.5a develop categories for sorting a collection of materials;
- Data and graphs: Interpret Venn diagrams (Second grade - R.8)
2.M.5b collect, organize, represent, and interpret data using pictographs, bar graphs, and tables;
2.M.5c generate questions, collect and organize data to address the questions, and draw conclusions;
2.M.5d read and interpret graphs and tables to identify main ideas, draw conclusions, and make predictions;
2.M.5e describe events that are more likely, least likely, or equally likely to happen;
- Probability and statistics: More, less, and equally likely (Second grade - V.1)
- Probability and statistics: Certain, probable, unlikely, and impossible (Second grade - V.2)
2.M.5f use physical models and pictures to represent possible arrangements of two or three objects;
2.M.5g identify events that can have more than one outcome, e.g., predicting weather, tossing coins;