TED Talks
Ted: Ted Ed: How to Prove a Mathematical Theory
Explore mathematical proofs and how they are used in our everyday life with this animated video. [4:39]
Texas Instruments
Texas Instruments: Logic Ladder App
As students work with two great activities - Factor and Classic, they learn how to use logic and reasoning skills.
Other
Math Court: A Game of Proving Things
This site contains a game to help students better learn how to write proofs. The game has several different levels. The game can be played online or cards and board may be printed and used in the classroom.
Education Development Center
Making Mathematics: Proof
This is a site which links to specific techniques of proving including conditional statements, proof by contradiction, mathematical induction, parity arguments, and the pigeonhole principle. The site contains a link to various example...
Education Development Center
Making Mathematics: Proof Several Different Aspects
This site is a support teacher site with numerous proof topics linked to areas of the page. A few of the topics include: What is a proof?, When Should Students Prove?, How Do We Prove?, Writing Proofs, When is a Proof Finished?,...
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: The Value of Two Column Proofs
This site explains why we prove things. The explanation gives real world scenarios and an everyday example of why we should learn how to prove things.
Varsity Tutors
Varsity Tutors: Hotmath: Practice Problems: Logic and Proof Exercises
Twenty-five problems cover the topic of logic and proof in different geometry settings. They are given with each step to the solution cleverly revealed one at a time. You can work each step of the problem then click the "View Solution"...
Varsity Tutors
Varsity Tutors: Hotmath: Graphing Calculator Practice Problems: Logic and Proof
Practice using your graphing calculator for logic and proof problems. If you get stumped or if you would like to check your work, then select the View Solution button, which is located directly under each problem.
McGraw Hill
Glencoe Mathematics: Self Check Quiz on Reasoning & Proof
The online assessment demonstrates knowledge of concepts utilized in Geometry. The multiple choice questions test students on mathematical reasoning and proof.
Oswego City School District
Oswego City School District: Working With Related Conditionals
Students are given a conitional statement and are to determine which choice is the converse of the statement.
Mathigon
Mathigon: Axioms and Proof
Explore this course in logic, sets, and proof including topics of axioms, set theory, and proof by contradiction and induction.
Math Planet
Math Planet: Geometry: Proofs Using Algebra
Examples and a video lesson help to explain proofs and logic. [1:57]
Math Planet
Math Planet: Geometry: Working With Logic
How to determine if a logical statement is true or false is explained through examples and a video lesson. [2:46]
Alabama Learning Exchange
Alex: Geometrica Fights Back!
This activity is designed to give students practice with the properties of special quadrilaterals (parallelograms, rectangles, rhombuses, squares, trapezoids, and kites). The students are provided with a "murder mystery" sheet with...
ClassFlow
Class Flow: Statements of Logic
[Free Registration/Login Required] Statements of Logic flipchart, interactively involves the students first through a series of review question on deductive structure, and then into the meat of conditional statements as well and Venn...
Cut the Knot
Cut the Knot!: Proofs in Mathematics
This site provides an explanation of mathematical proofs. It also has links to different types of proofs.