University of Hawai'i
Internet Chemistry: Oxidation Reduction Reactions
Good site to begin your study of oxidation-reduction reactions. Basic concepts, including ions and oxidation numbers, are covered. Includes simple examples of oxidation and reduction.
Clackamas Community College
Clackamas Community College: Single Replacement Reactions
A very useful site that includes examples of replacement reactions as well as exercises for practicing balancing replacement reactions.
Sophia Learning
Sophia: Chemical Reaction Types: Synthesis
A video lesson which illustrates how to identify and complete a synthesis chemical reaction. [8:08]
Clackamas Community College
Clackamas Community College: Combination Reactions
Synthesis reactions, also known as combination reactions, are explained in this chemistry tutorial. A few examples are shown. Links to practice examples and answers are provided.