Added pivot tables

README.md

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+# Pivot Tables Activities: Step-by-Step Guide
+
+## 📋 Overview
+This guide will walk you through completing the pivot table activities using LibreOffice Calc. You'll learn how to create pivot tables, analyze data, and troubleshoot common issues.
+
+## 🎯 Activities Checklist
+- **Activity 1:** Manual Data Analysis Challenge (10 minutes)
+- **Activity 2:** Create Your First Pivot Table
+- **Activity 3:** Recreate Example Pivot Tables (1C and 1B)
+- **Activity 4:** Advanced Analysis with Data Set 2
+
+## 🚀 Getting Started
+
+### Step 1: Download and Open the Spreadsheet
+1. Download the file: Pivot tables and advanced filtering (XLSX)
+2. Open the file in LibreOffice Calc
+3. Make sure you're using LibreOffice version 6.0 or higher
+
+## 📊 Activity 1: The Manual Challenge (Learning Hook)
+
+### What to Do:
+- Go to the Data 1 worksheet tab
+- DO NOT USE PIVOT TABLES for this activity
+- Manually calculate for each actor:
+  - How many episodes they appeared in
+  - Their total earnings
+
+### Step-by-Step:
+1. **Sort the data:**
+   - Select columns A-F (including headers)
+   - Go to Data → Sort
+   - Sort by "Surname" (Column A)
+
+2. **Count episodes manually:**
+   - For each surname, count how many rows appear
+   - Write this in a new column or separate sheet
+
+3. **Sum earnings manually:**
+   - For each actor, add up all values in the "Earnings" column
+   - Double-check your calculations
+
+### ⏱️ Time: 10 minutes
+**Reflection Questions:**
+- How many potential errors did you make?
+- How tedious was this process?
+- How would this scale with 1,000 rows of data?
+
+## 🔧 Activity 2: Create Your First Pivot Table
+
+### Step-by-Step Instructions:
+
+#### Step 1: Select Your Data
+- Go to Data 1 sheet
+- Select all data including headers (cells A1:F31)
+- Click cell A1
+- Hold Shift and click cell F31
+- Or press Ctrl+A to select all
+
+#### Step 2: Open Pivot Table Wizard
+- Go to Data → Pivot Table → Create
+- Select Current selection
+- Click OK
+
+#### Step 3: Configure Your Pivot Table
+- Drag and drop fields in the layout area:
+  - Drag "Surname" to ROW FIELDS
+  - Drag "Episode" to DATA FIELDS
+  - Drag "Earnings" to DATA FIELDS
+- Configure calculations:
+  - For "Episode": Double-click it → Select Count
+  - For "Earnings": Double-click it → Select Sum
+- Final layout should show:
+  
+  ```
+  Rows: Surname
+  Data: Count - Episode
+  Data: Sum - Earnings
+  ```
+
+#### Step 4: Place the Pivot Table
+- Choose New worksheet
+- Click OK
+- Your pivot table will appear on a new sheet
+
+#### Step 5: Verify Results
+- Compare your pivot table results with the example in Pivot table 1A
+
+## 📈 Activity 3: Recreate Example Pivot Tables
+
+### Task 3A: Recreate Pivot Table 1C
+1. Start fresh from Data 1
+2. Create a new pivot table
+3. Try this configuration:
+   - Rows: First Name
+   - Columns: Role
+   - Data: Count - Episode
+   - Data: Average - Earnings
+
+### Task 3B: Recreate Pivot Table 1B
+1. Create another new pivot table
+2. Try this configuration:
+   - Rows: Role
+   - Columns: Season
+   - Data: Sum - Earnings
+   - Filter: Surname (optional)
+
+### 💡 Tips:
+- Right-click on any cell in the pivot table → Refresh to update
+- Double-click any field in the layout to change its calculation
+- Drag fields between areas to experiment
+
+## 🎓 Activity 4: Advanced Analysis (Data Set 2)
+
+### Step 1: Navigate to Data Set 2
+- Go to Data 2 worksheet
+- Familiarize yourself with the columns:
+  - Subject, Session Type, Completed, etc.
+
+### Challenge 4A: Subject Completion Analysis
+1. Select all data in Data 2
+2. Create a new pivot table
+3. Configure:
+   - Rows: Subject
+   - Columns: Completed (Yes/No)
+   - Data: Count - Completed
+
+### Challenge 4B: Detailed Session Analysis
+1. Create another pivot table from Data 2
+2. Configure:
+   - Rows: Subject
+   - Columns: Session Type
+   - Data: Count - Session Type
+   - Data: Count - Completed
+3. Hint: You might need to add "Session Type" twice to get both calculations
+
+## ⚠️ Troubleshooting: Cells Not Auto-Recalculating
+
+### Problem: Pivot table doesn't update when source data changes
+
+#### Solution 1: Manual Refresh
+- Right-click anywhere in the pivot table
+- Select Refresh or Recalculate Pivot Table
+- Or use shortcut: F9 or Shift+F9
+
+#### Solution 2: Check Calculation Settings
+- Go to Tools → Options → LibreOffice Calc → Formula
+- Ensure AutoCalculate is checked
+- Under "Formula options", make sure:
+  - ☑ Automatically find dependencies
+  - ☑ Use OpenCL for formula calculation (if available)
+
+#### Solution 3: Force Complete Recalculation
+- Press Ctrl+Shift+F9 - This forces a complete recalculation of all formulas
+
+#### Solution 4: Check Data Range
+- Right-click the pivot table → Edit Layout
+- Verify the Source data range is correct
+- If you added new rows/columns to your source data:
+  - Edit the data range to include them
+  - Or recreate the pivot table with the new range
+
+#### Solution 5: Pivot Table Corruption
+- If nothing works:
+  - Copy your source data to a new sheet
+  - Create a brand new pivot table
+  - Reconfigure it from scratch
+
+## 💡 Pro Tips for Success
+
+### Tip 1: Naming Your Pivot Tables
+- Right-click the sheet tab
+- Rename it meaningfully:
+  - "Pivot_Subject_Analysis"
+  - "Pivot_Earnings_Summary"
+
+### Tip 2: Formatting for Readability
+- Select the pivot table
+- Use Format → AutoFormat for quick styling
+- Adjust number formats:
+  - Right-click currency values → Format Cells → Currency
+  - Right-click counts → Format Cells → Number
+
+### Tip 3: Saving Your Work
+- Save frequently as .ods (LibreOffice format)
+- If sharing with Excel users, also Save As → .xlsx
+- Consider saving pivot tables as separate files for different analyses
+
+### Tip 4: Documenting Your Process
+- Create a "Notes" sheet in your workbook
+- Document:
+  - What each pivot table shows
+  - Why you chose that configuration
+  - Any insights discovered
+
+## 🔍 Checking Your Work
+
+Compare your results with the example sheets:
+- Pivot table 1A: Basic actor summary
+- Pivot table 1B: Alternative view
+- Pivot table 1C: Different arrangement
+- Pivot table 2A: Subject completion analysis
+- Pivot table 2B: Detailed session analysis
+
+Note: Your teacher may hide the example sheets. If they're hidden, focus on whether your pivot tables provide meaningful insights.
+
+## 🆘 Getting Help
+
+### Common Issues and Solutions:
+| Problem | Solution |
+|--------|---------|
+| "Field not found" error | Check column names match exactly |
+| Numbers showing as text | Use Data → Text to Columns on source data |
+| Pivot table looks empty | Check data range includes all rows/columns |
+| Can't drag fields | Click "More" button in Pivot Table dialog |
+
+### When to Ask for Help:
+- After trying all troubleshooting steps
+- When you get consistent error messages
+- If your results are significantly different from expected
+- When you're spending more than 10 minutes stuck
+
+## 📚 Learning Reflection
+
+After completing all activities, ask yourself:
+- What was the most valuable insight you gained from pivot tables?
+- How much time did pivot tables save compared to manual analysis?
+- What real-world data would you like to analyze with pivot tables?
+- What configuration was most challenging to create?
+
+## ✅ Completion Checklist
+- [ ] Activity 1: Completed manual analysis (10 min challenge)
+- [ ] Activity 2: Created basic pivot table from Data 1
+- [ ] Activity 3: Recreated example pivot tables 1C and 1B
+- [ ] Activity 4: Created pivot tables for Data Set 2 (Challenges A & B)
+- [ ] Verified calculations match examples (or provide meaningful insights)
+- [ ] Saved work in both .ods and .xlsx formats
+- [ ] Documented process and insights in notes
+
+Remember: Pivot tables are a skill that improves with practice. The more you experiment with different configurations, the more powerful insights you'll discover in your data!
+
+---
+
+**Last Updated:** [Date]  
+**LibreOffice Version:** 7.0+ recommended  
+**File Format:** .ods (LibreOffice) / .xlsx (Excel compatible)