Unit 8

Time, Shapes, and Fractions as Equal Parts of Shapes

Math

Description: Students finish Grade 2 by describing and analyzing shapes in terms of their sides and angles. In Unit 7, students investigate, describe, and reason about the composition and decomposition of shapes to form other shapes. Students will tell and write time from the analog and digital clocks to the nearest five minutes.

Louisiana Student Standards for Mathematics (LSSM)

 Additional Cluster: MD – Measurement and Data Work with time and money.1 2.MD.7 Tell and write time from analog and digital clocks to the nearest five minutes, using a.m. and p.m. Additional Cluster: MD – Measurement and Data Reason with shapes and their attributes.[1] 2.G.1 Recognize and draw shapes having specified attributes, such as a given number of angles or a given number of equal faces.  Identify triangles, quadrilaterals, pentagons, hexagons, and cubes.  (Sizes are compared directly or visually, not compared by measuring.) 2.G.3 Partition circles and rectangles into two, three, or four equal shares, describe the shares using the words halves, thirds, half of, a third of, etc., and describe the whole as two halves, three thirds, four fourths.  Recognize that equal shares of identical wholes need not have the same shape.

Enduring Understandings:

·         Geometric figures can be described.

·         Geometric figures are found in our world.

·         Telling time is an essential life skill.

·         The length of time can be measured using standard units (seconds, minutes, hours, and days).

·         An analog clock can be used to tell time to the nearest five minutes.

·         Fractional parts are equal shares of a whole number, whole object, or a whole set.

·         The more equal sized pieces that form a whole, the smaller the pieces (fraction) will be.

Essential Questions:

·         How do we describe geometric figures?

·         Where can we find geometric figures in the world around us?

·         Is time important? Why?

·         How can we tell if an estimate is reasonable?

·         How do we show an equal part of something?

·         How are numbers used to show fractions?

·         How do use of fractions in everyday life?

·         How do we know how many fractional parts make a whole?