Terminology
New or Recently Introduced Terms 
 a.m./p.m.

 Analog clock 

 Angle (e.g., a figure formed by the corner of a polygon)

 Parallel (used to describe opposite sides of a parallelogram, e.g., “These sides are parallel because if they kept on going, they’d never intersect!”) 

      Parallelogram (a quadrilateral with both pairs of opposite sides parallel)

  Partition (used in reference to partitioning rectangles, e.g. “Let’s partition this rectangle to make an array” or “Let’s partition this tape to show the money that was spent and the money that was left. Which part will be longer?”)

  Pentagon (a two-dimensional figure enclosed by five straight sides and five angles) 

  Polygon (a closed figure with three or more straight sides, e.g., triangle, quadrilateral, pentagon, hexagon)

  Quadrilateral (a four-sided polygon, e.g., square, rhombus, rectangle, parallelogram, trapezoid) 

       Quarter past, quarter to 

       Right angle (e.g., a square corner) 

       Third of (shapes), thirds (three equal shares) 

   Whole (used in reference to fractions, e.g., 2 halves make 1 whole, and 3 thirds make 1 whole)