Developing Web Applications with Flask

Active learning works for spreadsheets because students need to experience the immediate impact of accurate data entry and formula use. When students enter data themselves, they see how structure and organization prevent errors in calculations. Hands-on practice also builds confidence in applying formulas to real datasets, which textbooks cannot replicate.

• JC 2
• Computing
• 4 activities
• 25 min–45 min

Learning Objectives

1. Identify the components of a spreadsheet interface including rows, columns, and cells.
2. Organize data into a structured table format within a spreadsheet with appropriate headers.
3. Calculate the sum and average of a dataset using spreadsheet formulas and cell references.
4. Demonstrate how changing a data value automatically updates formula results.

Ready-to-Use Activities

Inquiry-Based Learning

⏱ 25 min·Pairs

Pairs Challenge: Data Entry Relay

Pairs take turns entering survey data into a shared spreadsheet, labeling rows and columns correctly. One partner dictates values while the other types, then they switch to add headers and format cells. End with a quick sort by a column to check organization.

Prepare & details

How does a web framework simplify application development?

Facilitation Tip: During the Pairs Challenge, circulate to ensure students alternate roles between typing and checking each other's data entries for accuracy.

Setup: Tables for small groups, board for evidence

Materials: Phenomenon hook (image, anomaly, demo), Investigation protocol sheet, Data table or observation log, Findings synthesis template

• Apply
• Analyze
• Evaluate
• Self-Management
• Social Awareness

Inquiry-Based Learning

⏱ 45 min·Small Groups

Small Groups: Class Budget Tracker

Groups collect mock expenses from classmates, enter them into columns for categories and amounts. They insert SUM and AVERAGE formulas, then adjust data to observe changes. Discuss results and create a simple pie chart.

Prepare & details

What is the purpose of routing in a web application?

Facilitation Tip: For the Class Budget Tracker, assign specific roles within groups to keep discussions focused on data organization and calculations.

Setup: Tables for small groups, board for evidence

Materials: Phenomenon hook (image, anomaly, demo), Investigation protocol sheet, Data table or observation log, Findings synthesis template

• Apply
• Analyze
• Evaluate
• Self-Management
• Social Awareness

Inquiry-Based Learning

⏱ 35 min·Whole Class

Whole Class: Live Data Analysis

Project a blank spreadsheet; class calls out responses to a poll, teacher enters data. Students copy to personal sheets, add formulas for totals, and vote on filters. Compare class insights in plenary.

Prepare & details

How do templates separate logic from presentation?

Facilitation Tip: In the Live Data Analysis session, provide a printed dataset for students to reference while they build formulas on screen.

Setup: Tables for small groups, board for evidence

Materials: Phenomenon hook (image, anomaly, demo), Investigation protocol sheet, Data table or observation log, Findings synthesis template

• Apply
• Analyze
• Evaluate
• Self-Management
• Social Awareness

Inquiry-Based Learning

⏱ 30 min·Individual

Individual: Formula Debugging Quest

Provide spreadsheets with errors in SUM or AVERAGE formulas. Students identify issues like wrong cell ranges, fix them, and explain changes in adjacent cells. Submit corrected versions for review.

Prepare & details

How does a web framework simplify application development?

Facilitation Tip: During the Formula Debugging Quest, encourage students to verbalize their thought process when identifying and fixing errors.

Setup: Tables for small groups, board for evidence

Materials: Phenomenon hook (image, anomaly, demo), Investigation protocol sheet, Data table or observation log, Findings synthesis template

• Apply
• Analyze
• Evaluate
• Self-Management
• Social Awareness

Teaching This Topic

Teach spreadsheets by starting with concrete data rather than abstract formulas. Research shows students grasp concepts faster when they see the purpose behind organizing data, so use relatable examples like class scores or club budgets. Avoid overwhelming students with advanced functions early; focus first on accuracy in data entry and formula structure. Model troubleshooting by intentionally making errors and correcting them in front of the class, normalizing mistakes as part of learning.

What to Expect

Successful learning looks like students confidently entering diverse data types into cells, organizing information logically with headers, and applying formulas correctly. They should explain why cell references matter and troubleshoot errors collaboratively. By the end, students can calculate totals and averages independently and justify their spreadsheet choices.

Watch Out for These Misconceptions

Common Misconception

During Pairs Challenge: Data Entry Relay, watch for students assuming cells can only store numbers.

What to Teach Instead

Have pairs enter a mixed dataset with student names in column A and scores in column B, then discuss why labeling cells as text or numbers matters for sorting and formulas.

Common Misconception

During Formula Debugging Quest, watch for students using static numbers in formulas instead of cell references.

What to Teach Instead

Ask students to adjust one data value and observe whether their total updates automatically; if not, guide them to replace the static number with a cell reference like =SUM(B2:B10).

Common Misconception

During Class Budget Tracker, watch for students treating rows and columns as interchangeable.

What to Teach Instead

Ask groups to relabel their headers for clarity and recalculate totals, then compare the results to emphasize why rows represent individual entries and columns represent categories.

Assessment Ideas

Quick Check

After Pairs Challenge: Data Entry Relay, provide a new unsorted dataset of student quiz scores and ask students to enter it accurately, label columns, and calculate the total score and average score using SUM and AVERAGE. Collect their spreadsheets to check for correct data entry and formula application.

Exit Ticket

During Formula Debugging Quest, ask students to write on a slip of paper: 1. The cell reference for the total sales in January, 2. A formula to calculate the average of cells C3 through C12, 3. One reason why using a formula is better than calculating manually. Review responses to identify persistent errors.

Discussion Prompt

During Class Budget Tracker, pose the question: 'What other types of data might a small business track in a spreadsheet, and how would calculations help them?' Listen for mentions of inventory, expenses, or trends, and note whether students connect spreadsheet features to business decisions.

Extensions & Scaffolding

• Challenge: Ask students to create a second linked sheet in their Class Budget Tracker that calculates totals automatically when data in the first sheet changes.
• Scaffolding: Provide a partially completed spreadsheet template for the Formula Debugging Quest with highlighted cells to guide error identification.
• Deeper exploration: Have students research and apply conditional formatting to highlight high or low values in their Live Data Analysis dataset.

Key Vocabulary

Cell	The intersection of a row and a column, identified by a unique address (e.g., A1), where data is entered.
Row	A horizontal set of cells in a spreadsheet, identified by a number.
Column	A vertical set of cells in a spreadsheet, identified by a letter.
Formula	An expression entered into a cell that performs calculations, starting with an equals sign (=) and using cell references and operators.
Cell Reference	The address of a cell (e.g., B2) or a range of cells (e.g., C3:C7) used in formulas to refer to data.