2. Short Review
ACTIVITY: SHOW ME!
a. Divide the class into three teams.
b. Each team will pick a meta strip numbered 1 - 3.
c. Each meta strip has a corresponding task that each team should do
within 3 minutes.
d. When the time is done, each present their output to the class.
9. Lesson Purpose/Intention
We can use what we have learned about
representing sets in Venn diagrams to help us
find solutions to real-world problems.
Today we will employ Venn diagrams in finding
solutions to such problems.
10. Activity: “A RECALL-ection”
(5 minutes)
The teacher will give the following riddles to
the learners. Each team who have the most
correct answer wins.
11. No. 1
I have no traffic lights, yet cars go to and from,
Where roads meet, I'm the place to go.
At this bustling crossroads, you'll find me there,
A junction of paths, where people share.
What am I? INTERSECTION
12. No. 2
I am a mystery you cannot see,
Count me correctly, I hold the key.
In a set or a list, I'm what you seek,
The total count of elements you must speak.
What am I? Number of Elements
13. No. 3
"I am a group, a collection too,
Elements together, just like glue.
Arrange me right, and you will get,
A group of objects called a ___.
What am I?"
SET
14. No. 4
I'm a part of the whole,
But I'm smaller, you see.
In a set, I'm found,
Yet I'm not the entirety.
What am I? SUBSET
15. No. 5
I bring together what's been apart,
Combining elements with a start.
Shared members, both near and far,
Creating a bigger group by far.
What am I? UNION
16. No. 6
I'm a puzzle of overlapping rings,
Where common ground will show its wings.
Two sets unite, their borders blend,
In shapes and colors that never end.
What am I? VENN DIAGRAM
18. Key Term
Subset – Set A is
said to be a subset
of Set B if all the
element of Set A
are also present in
Set B
19. Key Term
Number of elements – the cardinality
of a set or the number of elements in
a set
20. Key Term
Union – the union
of two given sets
is the set that
contains all the
elements present
in both sets
21. Key Term
Set – a
collection of
distinct, well-
defined objects
forming a group
22. Key Term
Venn Diagram – is a
widely used diagram
style that shows the
logical relation between
sets, popularized by
John Venn
23. LESSON ACTIVITY
(25 minutes)
Angelo’s teacher asks her 30 students about
their sports after school. They say that they
can play one or more of the sports basketball,
football, and volleyball. Two students say
that they play none of the sports.
The teacher also finds out that:
1) 14 play football.
2) Angelo and 2 others play all 3 sports.
3) 15 play volleyball, 4 play football and
volleyball only, and 7 play volleyball and
basketball only.
24. Questions
1.(i) Show on the diagram the given information
that 3 students play all 3 sports.
(ii)Using this information and item 3 of Part 4A,
find how many students play volleyball only.
2. If 2 students play football only, find how many
play basketball and football only.
3. Find how many students play basketball only.
26. If 2 students play football only, find how many play
basketball and football only.
Answer: 5 students
27. Find how many students play basketball
only.
Answer: 6 Students
28. Question item 2
1. How many students play one sport only?
2. Angelo decides to no longer play basketball.
How many students then do not play exactly one
or two of the three sports?
3. How many students then play exactly two of
the three sports?
9
4
17
29. Activity: Ready – Set – Go!
Direction: Complete the phrase below. Assess yourself based
on how you understand the lesson.
statement
I am now ready to ……….
I am setting myself to ……..
I can now go and answer …….
30. Question to Ponder
o What do you think were the key
mathematical concepts addressed
in this lesson?
31. Question to Ponder
o Would you rate your level of
understanding of the material covered
in this lesson as high, moderate, or
low?
32. Question to Ponder
o Has the lesson helped you gain
further insight into aspects of the
material covered that represent
strengths or represent weaknesses?
33. Question to Ponder
o What would you describe as the
main barriers, if any, to your
ongoing progress and achievement in
relation to the topic area addressed
in this lesson?
34. Question to Ponder
o What do you think would best
assist your ongoing progress and
achievement in relation to the
topic area?
Editor's Notes
If the team picked no. 1 and 3, they will be asked to get the activity card (containing diagrams to be shaded using any coloring materials – see the questions below) and a coloring materials.
