Khan Academy
Khan Academy: Brain Teasers: Liar Truthteller Brain Teaser
Video explains how to solve a brain teaser involving two doors, with treasure behind one of the doors. Two people guard the doors. The first is honest and always tells the truth. The second lies and never tells the truth. What question,...
Khan Academy
Khan Academy: Brain Teasers: Forehead Numbers Brain Teaser
Video sets up and solves the following brain teaser: Three people with infallible logic are in a room together. Each has a number painted on their forehead. The numbers are unique, greater than zero, and one number is the sum of the...
Khan Academy
Khan Academy: Brain Teasers: Alien Abduction Brain Teaser
Video explains how to solve a brain teaser involving ten people who have been abducted by aliens. The people are arranged single-file, facing the same direction. Each person is wearing either a purple or green hat. No one can see the...
Khan Academy
Khan Academy: Brain Teasers: Toggler Brain Teaser
Video explaining how to solve a brain teaser involving five people. Four of the people are togglers--they alternate between lying and telling the truth--and the fifth person always tells the truth. The goal of the teaser is to figure out...
Khan Academy
Khan Academy: Brain Teasers: Blue Forehead Room
Video explains the following brain teaser: One-hundred perfect logicians are blindfolded and each has their forehead painted blue. They all enter a room with the lights off, sit in a circle, and the lights are turned on. Each logician...
Khan Academy
Khan Academy: Brain Teasers: Light Bulb Switching Brain Teaser
Video explains how to solve the following brain teaser: One hundred light bulbs are arranged in a row. Each light bulb can be either on or off. On the first pass of the row, each bulb is switched on. On the second pass, every other bulb...
Khan Academy
Khan Academy: Brain Teasers: 3 D Path Counting Brain Teaser
Video explains how to solve the following brain teaser: Starting in the upper left rear block of a 3x3 cube, how many different ways are there to get to the bottom right front block of the cube, with movement restricted to moving to the...
Khan Academy
Khan Academy: Brain Teasers: Blue Forehead Room Solution
Video explains the solution to the following brain teaser: One-hundred perfect logicians are blindfolded and each has their forehead painted blue. They all enter a room with the lights off, sit in a circle, and the lights are turned on....
Khan Academy
Khan Academy: Brain Teasers: Path Counting Brain Teaser
Video explains how to solve the following brain teaser: Starting in the upper left hand corner of a 6x6 grid, how many different ways are there to get to the bottom right corner of the grid, with movement restricted to moving to the...
Sophia Learning
Sophia: Cpctc: Lesson 4
This video lesson [6:45] will demonstrate the use of CPCTC in triangle congruencey proofs. It is 4 of 4 in the series titled "CPCTC."
Sophia Learning
Sophia: Cpctc: Lesson 1
This lesson [8:19] will demonstrate the use of CPCTC in triangle congruency proofs. It is 1 of 4 in the series titled "CPCTC."
Sophia Learning
Sophia: Making a Generalization: Lesson 9
This lesson demonstrates how to form a general statement in order to solve a problem. The video uses real-world examples to help students make a connection of generalizing math to generalizing everyday things in life.
Khan Academy
Khan Academy: Brain Teasers: Forehead Numbers Brain Teaser
The perfect logicians are at it again.
Sophia Learning
Sophia: Constant of Proportionality
Explore the term the constant of proportionality and assess learning with a quiz.
Sophia Learning
Sophia: The Constant of Proportionality and Unit Rates
Determine the constant of proportionality between unit rates. Assess learning with a quiz.
Sophia Learning
Sophia: Determining Proportionality Using Graphs and Tables
Use ratios within a table and graph to determine if the information is proportional. Assess learning with a quiz.
Virtual Nerd
Virtual Nerd: How Do You Find a Value to Make an Open Sentence True?
Take a look at this tutorial to see how to find the values that make an open sentence true. [5:59]
Khan Academy
Khan Academy: Brain Teasers: Alien Abduction Brain Teaser
Saving Earth from becoming a mushroom farm.
PBS
Wnet: Thirteen: Get the Math: Get the Math in Music Introduction
Manny Dominguez and Luis Lopez of DobleFlo talk about how their duo got started, how they use math in producing hip-hop music, and set up a music-related algebra challenge. Use music to solve mathematical word problems.
Khan Academy
Khan Academy: Statistics: Deductive Reasoning 1
Video explains the difference between inductive and deductive reasoning and then answers a question on which type of reasoning a given example uses. [2:00]
Khan Academy
Khan Academy: Difference Between Inductive and Deductive Reasoning
This video explains the difference between inductive and deductive reasoning and then discuss a given example.
Khan Academy
Khan Academy: Statistics: Inductive Reasoning 3
Video example of deductive reasoning with explanation of difference between inductive and deductive reasoning. [3:03]
Khan Academy
Khan Academy: Statistics: Deductive Reasoning 2
Video gives example of solving a radical equation with all steps given. Goes through checking the answer and discusses whether the problem uses inductive or deductive reasoning. [3:57]
Khan Academy
Khan Academy: Deductive and Inductive Reasoning: Deductive Reasoning 2
Video gives example of solving a radical equation with all steps given. Goes through checking the answer and discusses whether the problem uses inductive or deductive reasoning.