Originally, I want to introduce you Herman To, Herman Yu and
https://youtube.com/c/mathseasy.
They all did a great job in past ten years providing free math education videos.
Especially, Herman To explains maths in daily lives vividly.
After seeing your post about your daughter and son, I know they’re primary student and junior student. So 
, in my experience, that’s not much math equations to be learnt.
Back to the track, are you a primary school teacher? If I were your student, I would be grateful for your efforts, trying to bring math easier and memorable. I had an experience tutoring a primary six boy about half year. Though he does well in math, I improved his math a little. What I did most of the time is explain him the questions. Once he understood, what is doing there, he seldom did same mistake.
In addition, he learns math in cantonese.
@LynneKelly I am pretty curious how do you learn Chinese? In speaking, without a tutor, your pronunciation might sound orchid to Chinese people. eg I learn Spanish and Doulingo the bird always warn my pronunciation. In words, Traditional Chinese characters are more challenging than simplified. So my questions are how do you ensure your speaking is fluent and how do you learn the characters effectively?
@TanyaHart
for new comers in mnemonics, body palace is easy startup!
-
Say, when push your
hands in front, only Left hand 
can make an L shape, right hand can’t. -
Oh great! thumbs up representing Odd, you can imagine d as
. Even E as the fingers except the thumb. -
真分數 the number is real as the numerator is smaller than denominator.
. -
假分數 the number is false/improper as the numerator is bigger than denominator.
-
帶分數 mixed numbers, as it carries all the three parts of a number, eg
. 2
1—-
. 3
imagine the things turn into dust in your palm.
Memory technique does not necessarily tell you the logic of everything , it’s more like a hint which links the items you learnt in a sensible direction.
Keep up fun teachings!