1963eamonn's channel

Reconciling with the traditional Drake Equation

PBS NewsHour piece on the Khan Academy

Jamestown to the Civil War

Euclid and his Elements (and how much Abraham Lincoln liked them)

Multiplying a 2-digit times a 1-digit number

Stellar Parallax Clarification

Dividing into larger numbers. Introduction to long division and remainders.

Converting more interesting repeating decimals to fractions

u10_l2_t1_we3 One-Step Inequalities 2

u10_l2_t1_we2 One-Step Inequalities

Introduction to division

Multiplication 3: Learning to multiply 10, 11, and 12.

Introduction to the multiplication tables from 2-9.

u01_l2_t2_we3 Subtraction Word Problem

Subtraction of multi-digit numbers involving borrowing

An explanation of why (not how) borrowing/regrouping works when subtracting numbers

Another version of the stellar parallax introduction

Parallax in Observing Stars

Introduction to multiplication

U09_L2_T1_we2 Adding integers with different signs

u9_l2_t1_we1 Adding Negative Numbers

Why do we even care about the Drake Equation. Thinking about the fraction of a planet's life when a civilization might be detectable.

Star Field and Nebula Images

Parallel lines, transversal lines, corresponding angles

Introduction and examples of variables, expressions and equations

A Universe Smaller than the Observable

U05_L1_T1_we4 Representing a number as a decimal, percent, and fraction 2

U05_L1_T1_we3 Representing a number as a decimal, percent, and fraction

U05_L1_T1_we2 Describing the Meaning of Percent 2

Getting comfortable with evaluating newly defined function operators

Taking a percentage of a number.

U02_L1_T2_we3 Changing an Improper Fraction to a Mixed Number

Introduction to the first two logarithm properties.

A framework for thinking about how many detectable civilizations are out there.

Cosmological Time Scale 2

U03_L2_T3_we2 : Basic Rate Problem

u03_l1_t1_we4 Converting Fractions to Decimals

U03_L1_T1_we3 Decimals and Fractions

U05_L1_T1_we1 Describing the Meaning of Percent

Cosmological Time Scale 1

Cosmic Background Radiation 2 - Redshift of the Cosmic Background Radiation

Cosmic Background Radiation

Pangaea - the idea of Pangaea and some of the evidence behind it

Red Shift

Radius of Observable Universe

u08_l3_t1_we1 Box-and-Whisker Plots

U04_L2_T1_we3 t2 Find an Unknown in a Proportion 2

u10_l2_t1_we1 Inequalities on a number line

Hubble Image of Galaxies