The first thing I learned to cook was scrambled eggs on toast and how to make a cup of tea.
then Coconut pyramids
Scones
Rock cakes
Sponges (with and without fat) including a victoria sponge and a swiss roll.
pastry (cheese straws and a plate jam tart)
Boiled cakes....gingerbread
Rice pudding
Bread
Salads (totaly tasteless and pointless)
Stews
TBH i don't think that you nead to teach them that many techniques. Most of those you can pick up over time.
More what makes a basic meal, what goes with what, how much of different food types do you nead each day, how to cook on a limited budget.
How to be logical and follow the instructions.
The rest sort of comes, I think