Video Tutorial: Excel Modules 7 & 8
Two modules in one video. Work through them in order.
Data Validation and Error Control
- Setting rules to control data entry
- Dropdown lists and input restrictions
- Identifying and handling formula errors
- Keeping spreadsheets clean and accurate
Your First Real Spreadsheet
- Putting all previous modules together
- Building a structured financial spreadsheet
- Applying formatting, functions, and validation
- Best practices for ongoing use
💡 Tips for This Video
- Have Excel open and follow along as you watch
- Pause after each concept and try it yourself before moving on
- In Module 8, build the spreadsheet from scratch alongside the video
Try it with a real example
Open the example. Use Apple’s prefilled SEC filings as sample data. Build a three-row Excel sheet for fiscal year, revenue, and net income; add data validation so the year can only be a four-digit number, then deliberately enter an invalid year and confirm the warning.
Key takeaways
- Data validation restricts inputs according to a selected rule.
- An allowed input does not prove that every formula is correct.
- Trace a changed input through the workbook to check its effect.
Check your understanding
Answer each question, then open the explanation.
1. What is the purpose of a data-validation rule?
Show answer and why
Answer: To restrict or flag inputs according to the rule you selected.
Why: The rule should reflect what that cell is intended to accept.
2. If an input passes validation, is the workbook’s final answer necessarily correct?
Show answer and why
Answer: No. Formulas and assumptions still need checking.
Why: Input validation and calculation accuracy are separate checks.
3. How can you check whether an input is connected to the intended result?
Show answer and why
Answer: Change that input deliberately and trace the affected formulas.
Why: This helps reveal broken references or an output that is using a different cell.
Sources: Microsoft: Data validation
AI responses are for educational purposes. Always verify with official course materials.
This lesson teaches a concept. It is general education, not advice about your money. Before you act on anything you learn here, speak to someone licensed.
AI responses are for educational purposes. Always verify with official course materials.
This lesson teaches a concept. It is general education, not advice about your money. Before you act on anything you learn here, speak to someone licensed.
This lesson teaches a concept. It is general education, not advice about your money. Before you act on anything you learn here, speak to someone licensed.
