OBJECTIVES: To observe prisms of different shapes.
UNIT: 5
To identify properties of prisms.
FOCUS: MAKING PRISMS
LESSON: 4
COMMUNICATION
LANGUAGE OF LEARNING
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Vocabulary of the topic
Oblique prism (U5 L1)
Right prism (U5 L1)
Concaves (U2 L2)
Convex (U2 L2)
Face (U5 L1)
Base (U5 L1)
Edge (U5 L1)
Symmetry (U3 L1)
Parallel (U1 L1)
Parallelogram(U2 L4)
LANGUAGE FOR LEARNING

Language instruction
Play the game “Guess”.
Show a set of 3D shapes.
Ask for two volunteers. The 2 children stand in front of the class. They choose a
3D shape. The rest of the class makes questions about simple properties of the
3D shape .The answer can be only yes or no.
Show prisms of different shapes (right, oblique, concaves, and convexes).
Give a definition of the properties such as the shape of the lateral faces and
bases, number of edges and faces, number of vertices and axis of symmetry.
(look at power point U5 L4).
Ask if someone knows the meaning of right prisms, oblique prisms, irregular
concave and irregular convex. Establish that right prisms have two identical,
parallel bases and all other faces are rectangular; other faces of the oblique
prisms are parallelograms; a figure is convex if all line segments that join any
two interior points stay inside the figure; a figure is concave if any line segment
that joins two interior points goes outside the figure.
Classify the prisms in the groups above.
Split the class into 4 groups, one for each classification. Give out straws and
play dough. Children make prisms of different shapes.
Ask to make a table with properties of a prism(name; number of faces, vertices
and edges; net drawing). Ask what they notice.
Children explain their work to the class.
Make an exposition with all the constructions and the sheet of the properties.
Do the exposition according to the classification.
LANGUAGE THROUGH
LEARNING
 Language that comes
through the lesson



Questions for learning
Can they be stacked?
Are all the faces flat?
Are all the faces equal?
Has the vertex met more than 3 faces?
Has it got vertices?
What is a right prism?
What is an oblique prism?
What is a convex prism?
What is a concave prism?
What do you notice about the number of
faces and vertices?
Possible answers
Yes, they can/ No, they can not.
Yes, they are/ No, they aren’t.
Yes, they are/ No, they aren’t.
Yes, it has/ No, it hasn’t.
Yes, it has/ No, it hasn’t.
I don’t know/
Probably
Maybe it is a ….with…..
I think
The number of…….increases/
adds/grows.
Language to express conclusions
“ A right prism has two identical parallel bases and all other faces are
rectangular”
“An oblique prism has two identical parallel bases and other faces are
parallelograms”
“A figure is convex if all line segments that join any two interior points stay
inside the figure”
“A figure is concave if any line segment that joins two interior points goes
outside the figure”
RESOURCES: Set of 3D shapes, a variety of prisms, straws, play dough, P.Point shape properties U5 L4.