The following list links to WorkNotes which are self teaching including step by step thought processes.
Not all links are complete.

WorkNotes

BINOMIAL EXPANSIONS
CARDINAL NUMBERS
FACTORISING QUADRATIC TRINOMIALS
FRACTIONS
FUNCTIONS
GEOMETRY 1 - DEFINITIONS
GEOMETRY 2 - ANGLE SUMS
GEOMETRY 3 - DEDUCTION
INTEGERS
PYTHAGORAS
RIGHT ANGLE TRIGONOMETRY
SIMILARITY and CONGRUENCE
SOLVING EQUATIONS
SUBTRACTION ALGORITHM
SUBSTITUTION
TIMES TABLES