Teacher Resources
Smart Ledger Launch
How can we design a self‑auditing ledger that would convince a potential angel investor we keep "clean books" from day 1?
Duration: 2-3 weeksDifficulty: Beginner
Driving Question
Throughout this unit, you'll work with real startup scenarios to build their complete accounting system from the ground up.
How can we design a self‑auditing ledger that would convince a potential angel investor we keep "clean books" from day 1?
Performance Task
This mirrors real investor due diligence where financial systems and controls are scrutinized before investment decisions.
Investor Pitch + Live Demo
Present your self-auditing ledger to a panel of local finance professionals as if seeking angel investment.
- 4-minute pitch explaining the ledger's features and investor benefits
- Live Excel demonstration showing error-checking features in action
- Q&A response addressing panel questions about accuracy and reliability
- Professional presentation using business-appropriate language and visuals
Assessment Milestones
Aligned to implemented student lessons
Day 3: Prototype Ledger with 10 Transactions
MilestoneComplete functional ledger with basic transaction recording
- All transactions correctly posted using debit/credit rules
- Excel Table format with proper headers and structure
- Basic SUMIF formulas calculating account totals
- Trial balance showing mathematical accuracy
Day 5: Posting Validator + Controls
MilestoneImplement robust posting validation and self‑auditing controls
- XLOOKUP with IFERROR for account mapping and missing‑ID warnings
- SUMIFS controls validate postings across accounts
- Data Validation blocks invalid entries (negative amounts, stale dates)
- Professional documentation describing each control
Day 7: Trial Balance Auto-Check
MilestoneComplete error validation and correction system
- Formula validation: ABS(sum_debits - sum_credits) = 0
- Green/red indicator for balance status
- Error identification and correction guidance
- 100% accuracy on provided test dataset
Lessons (10)
Click a day to open the detailed lesson plan
Day 1
Introduction: Sarah's Challenge
Sarah's story, why clean books matter, and transaction categorization warm‑up
45 minutes
Day 2
Core Concepts: The Accounting Equation
Direct instruction on foundational accounting principles using TechStart examples
45 minutes
Day 3
Core Concepts: Debit & Credit Rules
Direct instruction on debit/credit mechanics using Sarah's TechStart transactions
45 minutes
Day 4
Excel Model: Tables & SUMIF Functions
Build Sarah's ledger foundation using Excel Tables and aggregation formulas
45 minutes
Day 5
Advanced Ledger Automation: Dynamic Trial Balance & Posting Validator
Implement posting validator, SUMIFS controls, and dynamic trial balance using advanced dataset
45 minutes
Day 6
Examples: Professional Ledger Applications
Analyze worked examples of self-auditing ledgers in real business contexts
45 minutes
Day 7
Exercises: Independent Ledger Construction
Students independently build complete self-auditing ledger for their TechStart focus area
45 minutes
Day 8
PBL Milestone 1: Project Definition
Definition → data plan → workbook skeleton
45–60 minutes
Day 9
PBL Milestone 2: Prototype + Rehearsal
Working prototype, validation tests, and structured rehearsal
60 minutes (+20 min peer feedback)
Day 10
PBL Milestone 3: Presentations + Peer Review
Final presentations to authentic audience; rubric-aligned peer reviews; reflection
40 minutes presentations + 5 minutes wrap
Prerequisite Resources
Files referenced in student lessons
Unit 1 Excel Templatedownload
Sample Transaction Datadownload
Standard Chart of Accountsdownload
Excel Functions Quick Referencedownload