PK-2.A Students use numbers in everyday and mathematical contexts to quantify or describe phenomena, develop concepts of operations with different types of numbers, use the structure and properties of numbers with operations to solve problems, and perform mathematical computations. Students develop number sense related to magnitude, estimation, and the effects of mathematical operations on different types of numbers. It is expected that students use numbers flexibly, using forms of numbers that best match a situation. Students compute efficiently and accurately. Estimation should always be used when computing with numbers or solving problems.
PK-2.A.1 Students understand and use number notation and place value to 1000 in numerals.
PK-2.A.1.a Read and write numbers to 1000 using numerals.
PK-2.B Students make measurements and collect, display, evaluate, analyze, and compute with data to describe or model phenomena and to make decisions based on data. Students compute statistics to summarize data sets and use concepts of probability to make predictions and describe the uncertainty inherent in data collection and measurement. It is expected that when working with measurements students: understand that most measurements are approximations and that taking repeated measurements reveals this variability; understand that a number without a unit is not a measurement, and that an appropriate unit must always be attached to a number to provide a measurement; understand that the precision and accuracy of a measurement depends on selecting the appropriate tools and units; and use estimation comparing measures to benchmarks appropriate to the type of measure and units.
PK-2.B.1 Students understand and use units of time, temperature, and money.
PK-2.B.1.a Apply and use sequences of hours in a day, days in a week, and months in a year.
PK-2.C Students use measurement and observation to describe objects based on their sizes and shapes; model or construct two-dimensional and three-dimensional objects; solve problems involving geometric properties; compute areas and volumes based on object properties and dimensions; and perform transformations on geometric figures. When making or calculating measures students use estimation to check the reasonableness of results.
PK-2.C.1 Students recognize, classify, and create geometric figures in two and three dimensions.
PK-2.C.1.a Identify shapes in the physical environment.
PK-2.D Students use symbols to represent or model quantities, patterns, and relationships and use symbolic manipulation to evaluate expressions and solve equations. Students solve problems using symbols, tables, graphs, and verbal rules choosing the most effective representation and converting among representations.
PK-2.D.1 Students understand how to represent quantities as simple expressions using addition and subtraction.
PK-2.D.1.a Show that any quantity can be represented by multiple equivalent expressions where each represents the quantity ten.