MD
Measure lengths indirectly and by iterating length units.
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- 1.MD.1. Order three objects by length; compare the lengths of two objects indirectly by using a third object.
- 1.MD.2. Express the length of an object as a  whole number of length units, by laying multiple copies of a shorter  object (the length unit) end to end; understand that the length  measurement of an object is the number of same-size length units that  span it with no gaps or overlaps. Limit to contexts where the object being measured is spanned by a whole number of length units with no gaps or overlaps.
Tell and write time.
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- 1.MD.3. Tell and write time in hours and half-hours using analog and digital clocks.
Represent and interpret data.
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- 1.MD.4. Organize, represent, and interpret  data with up to three categories; ask and answer questions about the  total number of data points, how many in each category, and how many  more or less are in one category than in another.