Curated OER
Easy Worksheet: Counterexamples
In this counterexamples worksheet, students solve 10 short answer problems. Students prove the given statements false by providing a counterexample thus disproving the statement.
CK-12 Foundation
Ck 12: Conjectures and Counterexamples
[Free Registration/Login Required] Students learn to make educated guesses, and how to disprove them with valid counterexamples.
CK-12 Foundation
Ck 12: Ferromagnetic Material: Maximizing 4 Pizza Slices
[Free Registration/Login Required] Students explore the concept of conjectures and counterexamples by navigating through the interactive learning module and then answering questions that go along with the module. Students can also learn...
Stefan Warner and Steven R. Costenoble
Finite Mathematics & Applied Calculus: Arguments and Proofs
The resource investigates arguments and proofs. The tutorial examines validity, Modus Ponens, counterexamples, and Modus Tollens. Students learn about the logic concepts through notes and examples. Practice exercises are included.
Khan Academy
Khan Academy: Types of Evidence
It can be useful to separate and identify different types of evidence used in an argument to support a conclusion. There are many ways to support a conclusion; this article will walk through some of the most common ones that you may see...
Sophia Learning
Sophia: Counterexamples: Lesson 7
This lesson will help a learner understand counterexamples. It is 7 of 7 in the series titled "Counterexamples."