1. Birthday line up What is it? When do you have it?
How do you say your birthday?
Can you guess my birth month?
April 1, 1962
1st of April, 1962
Now, please line up according to your birthday (date and month)

2. What are the important events in your birth of month?
January
February
March
April
May
June
July
August
September
October
November
December
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3. January – February – March – April – May - June
January 1 New Year
January 27 Commemoration of the victims of the Holocaust
February 4 World Cancer Day
February 14 Valentine’s Day
March 8 International Women’s Day
March 20 International Day of Happiness
March 22 World Water Day
March 24 World Tuberculosis Day
April 1 April Fool’s Day
April 2 World Autism Awareness Day
April 7 World Health Day
April 21 Kartini Day
May 2 National Education Day
May 20 National Awakening Day
May 31 World No Tobacco Day
June 1 Pancasila Sanctity Day
June 14 World Blood Donor Day

4. NUMBERS IN OUR LIVES

5. The importance of numbers in our daily lives
Phone numbers
Budget Calculation
Measurement
Prices
Facebook likes
Graphs and Charts

6. Try this! A quarter of the students (are, is) absent today.
The remaining 20% of the protein (form, forms) enzymes.
50% of the water in this area (is, are) polluted
Half of the teachers (hold, holds) a master’s degree.
Nearly one in four people worldwide (is, are) Muslim.
Nearly 25% of people in the world (is, are) Muslim.
Twelve percent of the building (has, have) been renovated.
Our staff (meets, meet) on Tuesday mornings to discuss customer complaints.
Our staff (works, work) hard to meet their goals and deadlines.
A bouquet of yellow roses (lend, lends) color and fragrance to the room.
My aunt or my uncle (is, are) arriving by train today.
Neither Juan nor his brothers  (is, are)  available.
Either Kiana or Casey  (is, are) helping today with stage decorations.
Breaking and entering is against the law.
The bed and breakfast was charming.

7. Rule 1. Percentages and Portions
Choose the correct answer in each number.
A quarter of the students (are, is) absent today.
The remaining 20% of the protein (form, forms) enzymes.
50% of the water in this area (is, are) polluted
Half of the teachers (hold, holds) a master’s degree.
Note: When we are looking at a sentence with words that indicate portions (percent in your example, also: fraction, some...), to choose the correct subject-verb agreement, we simply have to look at the noun after "of".
Source:

8. Try this! Nearly one in four people worldwide (is, are) Muslim.
Nearly 25% of people in the world (is, are) Muslim.
Twelve percent of the building (has, have) been renovated.
Our staff (meets, meet) on Tuesday mornings to discuss customer complaints.
Our staff (works, work) hard to meet their goals and deadlines.
Source:

9. Rule 2. Two nouns
A bouquet of yellow roses (lend, lends) color and fragrance to the room. Rule 2. A subject will come before a phrase beginning with of. This is a key rule for understanding subjects.

10. Rule 3. Either or, Neither nor
My aunt or my uncle (is, are) arriving by train today.
Neither Juan nor his brothers  (is, are)  available.
Either Kiana or Casey  (is, are) helping today with stage decorations.
Rule 3. Two singular subjects connected by or, either/or, or neither/nor require a singular verb.

11. Rule 4. Compound Nouns Breaking and entering is against the law.
The bed and breakfast was charming.
Rule 4. Compound nouns are considered one unit, so they are considered singular.

12. Reference
English Language Learners Stack, singular-or-plural