Materials covers what clay bodies and glazes are actually made from: the raw clays and minerals, the engineered blends potters throw with, and the chemistry that governs how a glaze melts.
Clay bodies covers the engineered blends potters actually throw with. Earthenware, Stoneware, and Porcelain are the three main body families, distinguished mainly by firing temperature and degree of vitrification.
Ball clay, Kaolin, and Silica are the raw clays and minerals a body is blended from. Grog, pre-fired crushed clay, and Slip, a clay body in liquid form, are two materials derived from a body rather than mined directly.
Feldspars & fluxes covers what lowers a glaze's melting point and how. Glaze and Glaze chemistry cover glaze formulation itself, from what a glaze is actually for through thinking in oxides rather than raw recipes; glaze application methods are covered separately under Glaze application, and glaze defects under Glaze defects.
Plasticity, Shrinkage, Absorption rate, Vitrification, and Porosity are the properties that determine how a body works wet and what it becomes once fired. Thermal shock resistance determines how a fired body holds up to rapid temperature change afterward.