This page has background information and resources for understanding and teaching morphology.

Morphology is the study of structure of words, analyzing words based on their morphemes (smallest unit of meaning in a word).

Every word is a base or a base with something else (another base or affix)

Bases and affixes (morphemes) are the meaningful building blocks that construct words.
We can analyze complex words into constituent morphemes with word sums and show their interrelationship with a matrix.
English spelling prioritizes consistent spelling of morphemes over consistent pronunciation of morphemes. (This is why we refer to morphemes by their spelling, not their pronunciation. The base of the word action is not referred to by the pronunciation of the word act. Instead, it is referred to by its spelling. The base “a - c - t”. This is the same as the fact that we don’t refer to the <-ed> suffix by one or all of its three pronunciations, we call it by its spelling “e-d suffix.")

Morphology Background Information & How to Use the Bug Club Morphology Program from a PD session.