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?,...
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"...