abril 12, 2026

Week 26, 27, 28 and 29 – Conditional Formatting and data validation

CLASS OBJECTIVE


Understand and apply Conditional Formatting in spreadsheets to automatically highlight data based on specific conditions.

Students will also learn the basic concept of Data Validation to control the type of information entered in a spreadsheet.


These tools help users identify patterns, reduce errors, and analyze information more efficiently.


Excel Conditional Formatting tutorial with examples


CLASS AGENDA


Introduction

Understanding how spreadsheets can automatically highlight important data.


Short Review

Remember what a spreadsheet cell, value, and range are.


Explanation

What Conditional Formatting and Data Validation are and why they are useful.


Demonstration

Creating rules in Google Sheets to automatically highlight data.


Practice Activity

Students apply formatting rules and create controlled input lists.


Homework

Apply conditional formatting and data validation to a small dataset.


1. Introduction


Imagine you have a list of student grades.


Instead of reading every number one by one, a spreadsheet can automatically highlight the most important information, such as:

  • Grades higher than 70

  • Grades lower than 60

  • Students who passed or failed


This is possible thanks to a tool called Conditional Formatting.


2. Short Review


Before learning this topic, remember the following concepts:

  • Cell: A single space in a spreadsheet where data is written.

  • Range: A group of cells (example: A1:A10).

  • Data: Information stored in a spreadsheet (numbers, text, dates).


Spreadsheets allow us not only to store information but also to analyze and organize it visually.


3. Explanation: What is Conditional Formatting?


Conditional Formatting is a tool that automatically changes the appearance of cells when they meet a specific rule or condition.


This helps users quickly identify patterns or important values.


Example


A spreadsheet can automatically:

  • Turn grades green if they are greater than 70

  • Turn grades red if they are lower than 60

  • Highlight specific words such as “Approved”


Instead of searching manually, the spreadsheet highlights the data instantly.


Basic Comparison Operators


Conditional formatting rules often use comparison operators.

Operator

Meaning

>

Greater than

<

Less than

=

Equal to

<>

Not equal to

These operators allow spreadsheets to evaluate conditions automatically.


4. What is Data Validation?


Data Validation is another spreadsheet tool that controls what type of data can be entered into a cell.


Instead of allowing any value, you can define rules for input.


For example:

  • Allow only numbers between 0 and 100

  • Allow only specific words such as Approved / Failed

  • Create a dropdown list of options


Why is Data Validation useful?

  • Prevents mistakes in data entry

  • Keeps information organized

  • Makes spreadsheets easier to analyze


Conditional Formatting shows patterns, while Data Validation controls the quality of the data.


5. Examples


Highlight numbers greater than 70


Example rule:


Highlight values greater than 70 in a grade column.


Result: High grades become visually easier to identify.


Highlight numbers lower than 60


Example rule:


Highlight values less than 60.


Result: It becomes easier to identify students who may need support.


Highlight specific text


Example rule:


Highlight cells containing the word “Approved”.


Apply a color scale


color scale automatically changes the color depending on the value.


Example:


Low numbers → red

Medium numbers → yellow

High numbers → green


This helps visualize patterns in large datasets.


6. Demonstration (Google Sheets)


Pay attention while the teacher shows the process step by step.


Students observe:

  1. Selecting a range of cells

  2. Opening Format → Conditional Formatting

  3. Choosing a condition

  4. Selecting a color style

  5. Applying the rule


Examples demonstrated:

  • Highlight numbers greater than 70

  • Highlight numbers less than 60

  • Highlight text equal to “Approved”

  • Apply a color scale


Students also observe how formatting updates automatically when values change.


7. Practice Activity – “Highlight the Data”


Students will work with a small spreadsheet containing grades or preferences.


They must apply at least three conditional formatting rules, such as:

  • Highlight grades greater than 80

  • Highlight grades less than 60

  • Highlight cells with the word Approved


Students will also create one Data Validation rule, for example:

  • A dropdown list with options:

    Approved / Failed


This ensures consistent data entry.


How to Copy Conditional Formatting in Google Sheets - knowsheets.com


9. Notes in Your Notebook


Answer the following questions:

  1. What is Conditional Formatting?

  2. What is a rule in conditional formatting?

  3. What are comparison operators used for?

  4. What is Data Validation?

  5. How can these tools help analyze information faster?


KEYWORDS


Conditional Formatting

A spreadsheet tool that changes the appearance of cells based on a rule.


Rule

A condition that determines when formatting is applied.


Condition

A logical test used to evaluate data.


Comparison Operators

Symbols used to compare values (> < = <>).


Data Validation

A tool that restricts the type of data that can be entered into a cell.


Range

A group of cells in a spreadsheet.