Elapsed Time, Schedules, and Calendar Intervals

Measure and estimate lengths, heights, and distances using standard customary and metric units and tools, and explain the relationship between unit size and unit count.

Compare lengths, draw line segments to specified measures, calculate perimeters of polygons, and solve length word problems within 100.

Estimate, measure, compare, and solve problems involving mass (grams, kilograms, metric tons) and read temperatures in degrees Celsius.

Estimate, measure, compare, and solve problems involving capacity and liquid volume using milliliters, centiliters, deciliters, and liters.

Read and write time to the hour, half-hour, quarter-hour, and nearest five minutes using analog, digital, a.m./p.m., and 24-hour notation.

Calculate elapsed time and end times within the same day, read schedules, and solve problems with days, weeks, months, and years.

Identify currency, count collections of coins and bills, make equivalent combinations, convert between major and minor units, and solve purchasing and change-making problems.

Formulate survey questions, collect data, organize observations using tally charts, lists, and two-way tables, and solve comparative questions.

Construct and interpret concrete graphs, picture graphs, single-unit bar graphs, and dot plots, answering comparison, total, and difference questions.

Describe, compare, and justify the possibility, impossibility, certainty, and likelihood of everyday events based on direct observation and qualitative experiments.