Codebymath.com - Online coding lessons that teach you about math.

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Displaying text

Speaking text

Displaying nice looking math

How programs flow

Programming as a calculator

Dividing by zero

Testing divisibility

Literal vs. to-be text

Using absolute values

Using Pi on the computer

Using square roots

Random numbers

Reading text from the keyboard

Getting clicks from the mouse

Square roots and the distance formula

Square roots and the Pythagorean Theorem

Finding Pythagorean Triples

Algebra vs. computer

Simple Graphics and Drawing

Drawing pixels

Choose a plotting color

Turtle Graphics and Logo Drawing

Turtle Fractals and Recursive Curves

The Cartesian Coordinate System

Zoom in or out

Infinite Inscribed Squares and Circles

Checkerboard disc coverage

Make the computer talk

Speaking text

Speaking text with different voices

Speaking text at different speeds

Speaking numbers properly

Variables in programming

Introduction

Mathematical expressions with variables

Calculate a tip

Calculate a tip (with keyboard input)

Distance formula with variables

Index Card Geometry and Area

Changing a variable in one line

Rescaling a result

Drawing lines with the mouse

Drawing circles with the mouse

The slope of a line

The for-loops: making graphs

Make it snow

Graph a line in slope-intercept form

Graph the absolute value

Graph a parabola

Graph a function

The Lorenz Attractor

The two burning candles

The for-loops: Simple computer animation

Animate a single pixel

Animate a more complex shape

Animate with laws of physics

Functions in programming

Introduction

Returning values

Convert between Celsius and Fahrenheit

Finding the Greatest Common Divisor (GCD)

Reducing fractions with the GCD

A better GCD calculator

Least common multiple (LCM)

Finding common denominators using the LCM

Add fractions and reduce answer to lowest terms

Is a number prime?

The Fibonacci Sequence

The Factorial

Computing Pi using factorials

Testing the derivative

Doing integrals numerically

Using sine and cosine

Test the famous sin/cos identity

Test the sin/cos identity graphically

Make cool polar plots

Coaxing Pi from the computer

Rotate a parabola

Rotating and Reflecting Points

Find sin(x) by adding numbers

Strings of text

Introduction

The length of a string

Comparing strings

Comparing strings (2)

Finding Palindromes

Palindromic squares

Patterns in Pi ($\pi$)

Patterns in Pi ($\pi$) (more)

The while-loop

I'll guess your number

Solving equations

$\sqrt{n}-\sqrt{n-1}<0.01$

Golden Ratio by Radical Iteration

Arrays

Introduction

Loops and arrays

Arrays and averaging numbers

Arrays and recurrence relations

Arrays and histograms

Histogram Pi's digits

Histogramming uniform rnd nums

Normally distributed rnd nums

Cellular Automatum

Birthday Surprise

Integer-preserving nonlinear recurrence

Card Pickup Passes and Eulerian Numbers

Symbolic math: Doing algebra on the computer

Introduction: combining exponents

Multiplying a polynomial by a monomial

Raising polynomials to some power

Simplify an algebraic expression

Symmetric Polynomials and Vieta's Formula

Polynomial Roots and Box Volume

Radical Exponents Puzzle

Code with Google Charts

Make a Chart

Make an (x,y) plot

Function grapher with crosshairs

Taylor series approximation

Linear vs exponential growth

The bell curve and normal distribution

Scatter plots and linear regression

Damped harmonic oscillations

Introduction to Data Science: Working with data and files

Introduction to data files

Reading data from a file

Reading all data from a file (1)

Reading all data from a file (2)

Testing for the end of file (EOF)

Find the total of some numbers

Find the average of some numbers

Find the maximum value

Find the minimum value

Confusion with max and min

Visualize data with a plot

Dealing with two column data files

Dealing with a line of CSVs

Graph a CSV file of CO2 concentration

Some challenges with CO2 concentration

Mining geographic data

Work with student grades

Reason about math with Prolog and Artificial Intelligence

We've written a paper about material in this section.

Introduction to Prolog: Facts and goals

Introduction Part II: Compound facts

Advice on quadratic equations

Traveling between cities

Coloring a map

Solving a right triangle

Simulating digital circuits (1)

Simulating digital circuits (2)

Simulating digital circuits (3)

Converting units

Reasoning about points and lines (1)

Reasoning about points and lines (2)

Looking for right triangles

Looking for rectangles

Reasoning about Sets and Venn Diagrams with AI

Euclid's GCD and reducing fractions

Knights and Knaves logic puzzles

Truth-tellers, Liars, and Alternators

Contest Map Coloring: Five Regions

Contest Statistics: Mean of a Data Set

Contest Combinatorics: Pairing Numbers

Contest Diophantine: Repeating Decimals

Contest Number Theory: GCD and LCM

Contest Sequences: Arithmetic and Geometric

Contest Counting: Digit String Constraints

Symbolic algebraic simplification

The river crossing puzzle and AI search

Making coin change and backtracking

Cryptarithmetic: TWO + TWO = FOUR

Propositional logic and truth tables

Trendlines and dealing with a list of numbers

Guess your own trendline

Compute the best possible trendline

Compute the r-value for a trendline

A list of numbers: the max, min, and average

A list of numbers: Make a histogram (Part 1)

A list of numbers: Make a histogram (Part 2)

A list of numbers: Plot the histogram (Part 3)

A list of numbers: Testing the standard deviation

Learning about probability using coins and dice

Rolling a die until a 6 comes up

The dice game of Craps

Picking blue, white, and red balls

Rolling a dice, twice

Not rolling a 7 or 11

The shape of luck: Sum of two dice

The Gambler's Fallacy and coin streaks

Rolling doubles and going to jail

The coin sequence race

Digit Sum Probability

Random String Cutting

Tournament odds and binomial series

Code to make an animated-GIF

Introduction: Make a flashing animation

Make a point move

Make a line move

Make a circle move

Make complex objects move

Functions make it easier

Riemann sums and calculus

The cycloid and rolling wheel

Times tables and cardioid mandalas

Lissajous curves and harmonics

Code with OpenStreetMap

Draw an OpenStreetMap

Place a marker

Draw with markers

Find distances on Earth

Draw a trail

Code with 3D Graphics

Introduction to 3D graphics

Depth with 3D graphics

3D graphics and the camera

3D graphics and the light source

Drawing in 3D with cubes

Drawing lines in 3D

Drawing polylines in 3D

Code with Sound

Musical scales and equal temperament

Coding for physics

Bouncing ball and gravity

The inclined plane and friction

The Galton board and bell curve

Newton's cradle and momentum

Projectile motion and trajectory

Coding with Cellular Automata

Conway's Game of Life and emergence

Wolfram's Rule 30 and chaos

The Sierpinski triangle and Rule 90

Forest fires and percolation thresholds

Coding with Chess

Chessboard coordinates and moving pieces

The Eight Queens puzzle and combinatorics

The Knight's Tour and vector geometry

Chess openings, game trees, and loops

Coding with Music & Math

Introduction to Coding Music and ABC Notation

Musical Symmetries: Bach's Geometry & Transformations

The Rubik's Cube: 3D Geometry and Algorithms

Introduction to the 3D Rubik's Cube

Code for your 3D Printer

Make a 3D-printable XY-graph

Parametric 3D print designs (clovers and more)

True 3D printing: helices, springs, and 3D knots

3D printing cups, vases, and bowls with revolve

302 total lessons.