ICSE Class 5 Maths, Unit 6: Geometry

What this unit aims at

The levels described by the Van Hieles are sequential, and success at one level depends on the development of geometric thinking at the preceding level. Typically, children at the primary level demonstrate characteristics of level 0 and are moving toward level 1 of the Van Hieles’ levels of geometric thought. Children entering the class V are most likely functioning in the visualization and analysis levels (0 and 1) of geometric thought. The goal of teaching geometry at this stage is to provide instructional activities that will encourage children to develop thinking and reasoning skills needed to move towards level 2 of the hierarchy, informal deduction (at upper primary stage). Building on children’s experiences with non-standard to standard measures they are ready to begin work with acquiring a confidence in using standard units and relate bigger to smaller and vice-versa.

Your child should be able to

• explore idea of angles and shapes
• classify angles into right angle, acute angle, obtuse angle and represents the same by drawing and tracing
• identify 2D shapes from the immediate environment that have rotation and reflection symmetry like alphabet and shapes
• identify angles in the environment through observation and paper folding
• identify rights angles in the objects and in the environment
• classify angles into right, acute, obtuse angles based on their visible attributes
• represent different angles (like acute, obtuse, right angles) by drawing and tracing on the paper
• explore symmetry in familiar 3D shapes
• explore reflection symmetry and rotational symmetry w.r.t. to familiar 2D- geometrical shapes
• construct the shapes of cubes, cuboids, cylinders and cones from the given nets (designed for this purpose)

Key concepts in this unit

• Angle and its measures.
• Classification of angles into right, acute, obtuse angles.
• Identification and representation of acute, obtuse and right angles.
• Symmetry in familiar 3D
• shapes like Cube, human body, buildings etc.: Reflection and rotational symmetry in familiar 2D- geometrical shapes like circle, rectangle, square, triangle and circles.
• shapes like Cube, human body, buildings etc.: Nets of cubes, cuboids, cylinders and cones.