Here’s another thing that is long past its expiry date.
What are Highest Common Factor and Least Common Multiple actually for? And “It makes adding fractions simpler” is just nonsense. It may be that much later on, for those with a real interest in pursuing math, there is something useful there, but such people at that stage would be able to pick up the ideas and apply them in about 10 minutes.
If I want to add two fractions with different denominators then the simple and fairly obvious rule: “multiply top and bottom of each fraction by the denominator of the other one” is perfectly adequate, and if the student spots a common factor in the resulting fraction it can be removed then.
A separate but equally pointless activity is adding fractions with seriously different denominators. If you really want the answer then use a calculator. And get a clue about checking the result for realism.
I am sure there is more stuff in math courses which could be sent on its way, leaving time to do some interesting stuff.