What is the difference between active dry yeast and instant yeast (also known as bread machine yeast)?
Instant yeast is a little more potent than active dry yeast and can be mixed in with your dry ingredients directly. I generally find it easier to work with. Active dry yeast works just as well as instant yeast, but requires being activated in a little bit of warm water before being added to the rest of the ingredients. Failure to properly activate it will result in your loaf not rising adequately.