Custom Videos:    www.educreations.com

                          Symbols:  https://www.rapidtables.com/math/symbols/Logic_Symbols.html

                      Tables & Ops Basics:   https://en.wikipedia.org/wiki/Truth_table

              Pf. Serna on Truth Tables:   https://www.youtube.com/watch?v=OLGVhszBlq4

                             K-Maps (3 Vars):    https://www.youtube.com/watch?v=3I3eyupO8YM

                        Binary Subtraction:    https://www.youtube.com/watch?v=dQMQMvU4GT0

                       Two's Complement:    https://www.youtube.com/watch?v=vfY7bN_3VKw

                          Number Systems:    https://www.youtube.com/watch?v=iaLeDnjeauc

                            Valid Arguments:   https://www.youtube.com/watch?v=KnlnRsJsmOs

                 Quantified Statements:    https://www.youtube.com/watch?v=JKd_I2tjML4

                          Divisibility Rules:    http://www.mathplayground.com/howto_divisibility.html

                       Euclid's Algorithm:    https://www.youtube.com/watch?v=AJn843kplDw

             Chinese Remainder Thm:   https://www.youtube.com/watch?v=Y5RcMWiUyyE

                 Recursion on Patterns:   https://www.youtube.com/watch?v=xHsWEGSVLYk

   Sigma Notation:  http://math.illinoisstate.edu/day/courses/old/305/contentsummationnotation.html