Preguntas sobre ejemplos de oraciones con, y la definición y uso de "Saxon"

A: Even though they express more than possession, I call the Saxon Genitive "possessives". What you have in your sentence may look like possessives, but they are really noun phrases.
It isn't the game that belongs to tic-tac-toe, but tic-tac-toe identifies which game you are talking about. The game of tic-tac-toe rather than tic-tac-toe's game.
Although you can say "to broaden a student's understanding.." (true possessive.), here it is a noun phrase taken as a whole. The process of "student understanding". It is a more general phrase than "a student's understanding", although both can refer to the same thing.
Are you confused about "instructional content"? Again, it is a noun (content) and an adjective (instructional).
Possessives are used to show a direct connection or ownership. My neighbor's cat, Tom's coat, etc. This is different than a descriptive phrase ("the neighborhood cat" means a cat that lives in the neighborhood, but it is not owned by anyone or anything).

A: The Saxon Genitive is used with the nouns for people, animals, and countries to show possession. In those cases it can be substituted for "of" without changing meaning, although sometimes the substitution sound awkward.

My dad's friends = the friends of my dad.
The horse's mouth = the mouth of a horse
America's pride = the pride of America


My dad's contact lenses = The contact lenses of my dad. (Correct but not common.)
This is John's car = This is the car of John (correct but very uncommon)

A: In general, it works like this:

(singular)
That's the boss's car.

(plural)
The bosses' cars were all exorbitantly expensive.

Beyond that, there's no hard rule, and it's actually too damn complicated to bother with if you just want to write English like a normal or even fairly educated person.