This interactive tutorial will teach you how to use the sequent calculus, a simple set of rules with which you can use to show the truth of statements in first order logic. It is geared towards anyone with some background in writing software for computers, with knowledge of basic boolean logic.
T. Mossakowski, and A. Tarlecki. 17th International Conference on Foundations of Software Science and Computation Structures (FoSSaCS), volume 8412 of Lecture Notes in Computer Science, page 441-456. Springer-Verlag Berlin Heidelberg, (2014)
M. Codescu, and T. Mossakowski. Algebra and Coalgebra in Computer Science, CALCO'11, volume 6859 of Lecture Notes in Computer Science, page 145-160. Springer, (2011)