Duration: 45 minutes
By the end of this lesson, you will be able to:
Data = Information or facts we collect about something
Think about these examples:
Data helps us:
Example: If we know which days have the most absent learners, the school can investigate why!
Tally marks help us count quickly and accurately
How tally marks work:
| = 1 || = 2 ||| = 3 |||| = 4 /|||| = 5 (we cross the fifth one)
Grouping by fives makes counting easier!
Example: Count these marks
/|||| /|||| /|||| |||
Instead of counting 1, 2, 3, 4, 5, 6, 7... up to 18, We count: 5, 10, 15... plus 3 = 18
Much faster!
What numbers do these represent?
||||
/|||| ||
/|||| /||||
/|||| /|||| |||
Well done!
Question: How do you travel to school?
Categories:
Let's collect data from our class!
As each learner responds, we make one tally mark:
Walking: |||| || Bicycle: ||| Boda-boda: |||| |||| Car/taxi: || Other: |
Everyone must be counted once!
A frequency table shows how many times each item appears
Three columns:
A table makes data easy to read and understand!
Look at our table and answer:
Think about your answers!
Tables make comparisons easy!
Remember these four steps:
Follow these steps every time!
Tables are better than random notes because:
Given data about favorite fruits:
In your exercise book, create a frequency table with tally marks!
Which fruit is most popular? Oranges!
Where do we see frequency tables?
Data tables are everywhere!
Today we learned:
Tomorrow's lesson: We will learn to show our data in pie charts
What to remember:
Pick one topic:
Then:
Expected time: 20 minutes