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2 Dimensional Shapes

 Subject: Math

 Grade Level: 3rd

Standards:
 – MA.3.G.3.1-Describe, analyze, compare, and classify two-dimensional shapes using sides and angles
–including acute, obtuse and right angles–and connect these ideas to the definition of shapes.
Objective:
 Identify acute, right and obtuse angles in shapes and objects and be able to replicate them on paper and through creative projects.
Background:
 Students have a basic understanding that when 2 rays (lines) come together at one point, they form an angle. This can be a straight, right, acute or
obtuse angle. They understand that these angles can form both 2D and 3D shapes and are vary important factors to consider when constructing buildings and bridges.
Materials:
rulers, hinged rulers, dry erase markers, personal white boards, paper towels, crayons, pencils, paper, long pointer (or laser pointer depending on the children’s abilities and responsibility level)
For struggling students
-Have students work in pairs with their individual while boards and have them practice drawing shapes and angles and have their
partner identify the appropriate angle. If the student is struggling to physically draw the angles, allow them to use 2 rulers that have been connected at the ends to form a hinge. This will not only help them physically draw the angles, but better understand the connection between their different sizes.
For students who finish early
-Have students work in pairs to play “angles pictionary”. For this game, students work in pairs using their dry erase boards. One student is given a set of index cards that have different shapes and simple pictures. As they start to draw what is on the card, the other student will have to
guess what is being drawn. If they guess correct, they must correctly identify all of the angles in the drawing to win.
Introduction:
 It may be difficult for some students to not only make the angles, but make the connection of their relation to each other when considering size.
To help with both of these factors, provided a kinesthetic activity and just simply get antsy kids out of their seats, you can do the following: when teaching the different angles and what they look like, have students get out of their chairs and replicate those angles with outstretched arms. This can easily be made into a game of “Simon Says” or a competitive race between 2 groups with the use of flash cards.
 
Tiered According to Ability and Readiness
Below Grade Level
– Identifying and drawing
      Students will identify all 4 types of angles and draw different examples of those angles in a worksheet format.
 On Grade Level
-Angles in a building
      The student will draw a picture of a structure that uses at least 6 angles. They will label all of the angles in the picture; showing their understanding of angles that are found in different shapes.
Above Grade Level
– In the room connections
      Students will identify at least 6 angles (with at least 1 example of each) in items and structures around the classroom and log it into a list where they describe both the item and the angle it creates and be able to point it out in the room. The student will also draw a picture of the object to show the angle.
Assessment:
Students will be assessed according to the guidelines of his/her IEP. Observations and a collection of work samples will be used to determine the
students’ depth of understanding. These assessments will determine the students strengths and weaknesses, as well as where further support is needed.
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