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Alan Matthew

I help students in their studies by creating multiple complex tools.

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How to Pass an Online Class When You're Behind, Overwhelmed, or Working Full-Time

How to Pass an Online Class When You're Behind, Overwhelmed, or Working Full-Time

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4 min read

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Structuring a Service Page for Answer Engines: 5 Patterns That Work

Structuring a Service Page for Answer Engines: 5 Patterns That Work

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2 min read
Population Growth Sandbox: 6 Experiments That Show How Carrying Capacity Really Works

Population Growth Sandbox: 6 Experiments That Show How Carrying Capacity Really Works

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12 min read
Debugging PCR Like a Developer: 7 Master Mix "Bugs" (and a Free Calculator to Prevent Them)

Debugging PCR Like a Developer: 7 Master Mix "Bugs" (and a Free Calculator to Prevent Them)

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2 min read
Are Your Dice Loaded? Chi-Square Explained Through Mendel's Peas (+ a Free Calculator)

Are Your Dice Loaded? Chi-Square Explained Through Mendel's Peas (+ a Free Calculator)

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2 min read
5 Punnett Square Mistakes That Cost Students Points (and a Free Calculator to Catch Them)

5 Punnett Square Mistakes That Cost Students Points (and a Free Calculator to Catch Them)

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2 min read
How AP Biology Scoring Works (Plus a Free Calculator to Estimate Your 1-5 Score)

How AP Biology Scoring Works (Plus a Free Calculator to Estimate Your 1-5 Score)

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4 min read
Why Running Three t-Tests Is a Bug (and How One-Way ANOVA Fixes It)

Why Running Three t-Tests Is a Bug (and How One-Way ANOVA Fixes It)

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16 min read
Finding Outliers with the IQR Method: Tukey Fences, Quartile Gotchas, and Code

Finding Outliers with the IQR Method: Tukey Fences, Quartile Gotchas, and Code

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9 min read
Cronbach’s Alpha Explained: Formula, Worked Example, and Python Code

Cronbach’s Alpha Explained: Formula, Worked Example, and Python Code

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7 min read
How to Calculate a Confidence Interval for the Mean (z vs t, With a Worked Example)

How to Calculate a Confidence Interval for the Mean (z vs t, With a Worked Example)

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3 min read
Your Invoice Table Is a Cash-Flow Dashboard: Computing AR Turnover and DSO in SQL + JS

Your Invoice Table Is a Cash-Flow Dashboard: Computing AR Turnover and DSO in SQL + JS

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7 min read
The One Equation Every Dev Building Money Features Should Know (With Code)

The One Equation Every Dev Building Money Features Should Know (With Code)

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8 min read
Accounts Receivable Turnover in Code: The Formula, the Gotchas, and a Free Calculator

Accounts Receivable Turnover in Code: The Formula, the Gotchas, and a Free Calculator

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3 min read
Build a Truth Table Generator in Python (Parser, Evaluator, Tautology Checker)

Build a Truth Table Generator in Python (Parser, Evaluator, Tautology Checker)

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4 min read
Balancing Chemical Equations Is Just Linear Algebra (Here's the Code)

Balancing Chemical Equations Is Just Linear Algebra (Here's the Code)

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2 min read
Probation Calculator for Academic Standing & GPA Recovery

Probation Calculator for Academic Standing & GPA Recovery

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9 min read
Free APA, MLA, Chicago Bibliography Maker

Free APA, MLA, Chicago Bibliography Maker

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9 min read
The Silent Crisis: Detecting and Preventing Student Burnout Before It's Too Late

The Silent Crisis: Detecting and Preventing Student Burnout Before It's Too Late

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7 min read
College Workload & Study Hours Calculator

College Workload & Study Hours Calculator

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5 min read
Technical Deep Dive: Building a Multi-Mode Academic Grade Engine with JavaScript & Weighted Algorithms

Technical Deep Dive: Building a Multi-Mode Academic Grade Engine with JavaScript & Weighted Algorithms

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4 min read
Hardy-Weinberg Equilibrium Explained: The Probability Math Behind Gene Pools 🧬📊

Hardy-Weinberg Equilibrium Explained: The Probability Math Behind Gene Pools 🧬📊

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2 min read
System Limits & Infrastructure Crash Course: The Math Behind Carrying Capacity ($K$) 📈🌐

System Limits & Infrastructure Crash Course: The Math Behind Carrying Capacity ($K$) 📈🌐

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2 min read
Why PCR Master Mixing is Just Batch Processing (And How to Eliminate Off-by-One Errors) 🧬🧪

Why PCR Master Mixing is Just Batch Processing (And How to Eliminate Off-by-One Errors) 🧬🧪

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2 min read
Why Your A/B Test Results Might Be a Lie: How to Audit Categorical Data 📊🧪

Why Your A/B Test Results Might Be a Lie: How to Audit Categorical Data 📊🧪

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2 min read
Why Genetics is Just Combinatorics (And How to Algorithmitize the Punnett Square) 🧬💻

Why Genetics is Just Combinatorics (And How to Algorithmitize the Punnett Square) 🧬💻

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2 min read
Stop Using Standard Deviation for Anomaly Detection: The IQR Rule Explained 🧹

Stop Using Standard Deviation for Anomaly Detection: The IQR Rule Explained 🧹

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2 min read
Case Study: How a Broken Survey Ruined Our Product Roadmap (And How We Fixed It) 📐

Case Study: How a Broken Survey Ruined Our Product Roadmap (And How We Fixed It) 📐

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3 min read
Stop Guessing Sample Sizes & Margins of Error: The No-BS Guide to Confidence Intervals 📊 🔥

Stop Guessing Sample Sizes & Margins of Error: The No-BS Guide to Confidence Intervals 📊 🔥

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3 min read
I Built an Interactive Accounting Equation Calculator with Next.js & Tailwind (Here's How It Works)

I Built an Interactive Accounting Equation Calculator with Next.js & Tailwind (Here's How It Works)

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3 min read
How I Built a Reactive Percent Yield Calculator for Chemistry & Lab Devs 🧪⚡

How I Built a Reactive Percent Yield Calculator for Chemistry & Lab Devs 🧪⚡

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3 min read
How I Built a Reactive Limiting Reactant Calculator for Chemistry & Science Devs 🧪⚡

How I Built a Reactive Limiting Reactant Calculator for Chemistry & Science Devs 🧪⚡

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3 min read
How I Built a Reactive Homework Overload Calculator for Stressed Students 📚⚡

How I Built a Reactive Homework Overload Calculator for Stressed Students 📚⚡

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3 min read
How I Built a Reactive Formal Charge Calculator for Chemistry & Science Devs 🧪⚡

How I Built a Reactive Formal Charge Calculator for Chemistry & Science Devs 🧪⚡

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3 min read
How I Built a 3D Disk Method Calculator That Doesn't Suck 🍩⚡

How I Built a 3D Disk Method Calculator That Doesn't Suck 🍩⚡

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3 min read
How I Built a Reactive 3D Volume of Revolution Calculator with Calculus Logic in Pure Web Tech 📐⚡

How I Built a Reactive 3D Volume of Revolution Calculator with Calculus Logic in Pure Web Tech 📐⚡

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3 min read
Building a Reactive Hardy-Weinberg Equilibrium Calculator in Pure JS 🧬⚡

Building a Reactive Hardy-Weinberg Equilibrium Calculator in Pure JS 🧬⚡

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3 min read
How I Built a Zero-Latency APGAR Score Calculator for Healthcare & Nursing Students 👶⚡

How I Built a Zero-Latency APGAR Score Calculator for Healthcare & Nursing Students 👶⚡

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2 min read
Anion Gap Calculator: Comprehensive Clinical Electrolyte Analysis, Acid-Base Interpretation, and Diagnostic Decision-Making

Anion Gap Calculator: Comprehensive Clinical Electrolyte Analysis, Acid-Base Interpretation, and Diagnostic Decision-Making

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13 min read
Building an Interactive Break-Even & CVP Analytics Engine in Modern TypeScript :

Building an Interactive Break-Even & CVP Analytics Engine in Modern TypeScript :

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2 min read
Building an Accounts Receivable & DSO Analytics Engine in Modern TypeScript

Building an Accounts Receivable & DSO Analytics Engine in Modern TypeScript

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4 min read
How I Built an Accounting Engine in Pure TypeScript (And What Broke Along the Way)

How I Built an Accounting Engine in Pure TypeScript (And What Broke Along the Way)

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4 min read
Punnett Square Simulator: Modeling Mendelian Inheritance and Hardy-Weinberg Equilibrium in JavaScript

Punnett Square Simulator: Modeling Mendelian Inheritance and Hardy-Weinberg Equilibrium in JavaScript

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1 min read
Financial Amortization & NPV Calculator

Financial Amortization & NPV Calculator

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4 min read
Building an AST-Driven Propositional Truth Table Generator in JavaScript

Building an AST-Driven Propositional Truth Table Generator in JavaScript

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1 min read
Balancing Chemical Equations with Linear Algebra in Pure JavaScript

Balancing Chemical Equations with Linear Algebra in Pure JavaScript

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1 min read
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