Tag Archives: kids teaching

Degrees and angles | 角度

Today in the fourth grade weekend lesson we learned about angles📐 and degrees. We explained what degrees was first🥇 because angles are classified using degrees📏. Degrees were discovered by Egyptians. They invented the degree symbol ° and also came up with the 360° circle⚪.  There is an interesting history of how they connect the movement of the Sun with time.   They first divided a year into 360 days, noting that the Sun moved in a circle. Around 1500 BC Egyptians divided 24 hours⏳, though the hours varied with the seasons originally. Then the Greek astronomers made the hours equal. About 300 to 100 BC the Babylonians subdivided the hour into base-60 factions: 60 minutes an hour and 60 seconds in a minute.

We use degrees to measure angles. An angle is a figure formed by two rays🛴 called sides of the angle. In geometry there are three types of angles: an acute angle between 0 and 90 degrees, right angle a 90 degree angle, and an obtuse angle between 90 and 180 degrees. In 1936 a clay tablet was found buried at Shush (Khuzestan region of Iran🌏) some 350km from the ancient city of Babylon on which was inscribed a script that was only translated as late as 1950. The text provided confirmation that the Babylonians measured angles using the figure of 360 to form a circle. The Babylonians knew that the perimeter of a hexagon was exactly equal to six times the radius of a circumscribed circle. This is why they chose to divide a circle in 360 parts⚪. If we did not discover degrees or angles we would not be able to build anything properly🧱. So if we tried building a house without degrees or angles the house would collapse🏚.

We will talk about triangles next time.

Welcome to our New Google Classroom!!😃

Hello everybody!😃 Welcome back to Magic Math Mandarin.  Since we are staying home because of covid-19, we brought our classes to google classroom so our students can keep on learning even during this pandemic👩‍🏫. Now we can all communicate with each other online💻. In this classroom we will be learning Chinese🈷, math➗, and programming👩‍💻. Our teachers will put new assignments everyday about each topic.  If you would also like to join our wonderful classrooms then here is the class code mtxl6j4

Remember to stay home and don’t get sick!😷 Please join our classroom today!👍💖


How to Assign A Shortcut Key to a Style in MS Word

Hello everybody!😃 Today in class we learned how to assign a shortcut key 💻 to a style in Word. What we learned today will be very useful if you are changing all the fonts in a Word document and if you must finish very quickly. In class we assigned a shortcut ourselves. The shortcut is Ctrl Shift E. We made this shortcut to be able to change whatever words we highlight to the font called Normal style in Word.

To do this in Word you have to be on the Home page. Then look in the box called styles and click the thing on the bottom right corner.

After you press that pick a style then click the arrow 🔽 on the style you want.

Then click modify and click Format on the bottom left corner. When you press that there will appear some option click Shortcut Key.

Pick a shortcut you want to give to your style and then press assign.

Yay!! You have now learned how to assign a shortcut key to whatever style you want in MS Word 👨‍🎓👩‍🎓! We will learn much more things in the future😃. Anything is possible.

Loops in Swift Code | 循环 Xúnhuán

Hello everybody! Today in class we have learned 👩‍🏫 how to write loops 循环 (Xúnhuán) in Swift code 👩‍💻. We learned two kinds of loops ➰.

The first type of loop that we learned was a loop ➿ that repeats itself for a certain amount of times⏲. We learned 🏫 how to write this kind of loop in Swift code. Here’s an example.

for i in 1 … 4 {

for i in 1 ... 4 {

Next we learned another loop ⭕ that repeats itself until the condition is false🙅‍♀️. This loop is called a while loop. Here’s an example.

while thereIsACoin {

while thereIsACoin {

In a while loop the loop will go forward ⏩ and collect the coin 💰 nonstop until the is no more coins ☹ in front of the coin collecter to collect. This is what we have accoplished today in class 👩‍🎓👨‍🎓.

We will learn much more very soon. Goodbye!!😃😃

In the meantime, please do your homework, and use the Swift documentation (aka “instructions”).

Halloween 🎃 and holiday money spent | 万圣节及其他节日的花费

Today in class Emma asked how much money people spent on Halloween 🎃 every year.   So, the class went on doing research on this question.

Here are what the children have found out:

People spent about $6.9 billion on Halloween each year. That’s a lot!

But why do people spent so much money on Halloween?!

💡The wisest answer among us may actually be children, whose uncluttered minds spoke the following super impressive and honest words (credit to Vickie, our little teacher and author):

If people didn’t spend so much money on Halloween, then we could use all that money to improve buildings, roads, the Navy, Army, Air Force etc.  Plus, why don’t the people save the money for retirement or to just to pay off their college student loan or mortgage.

Later in the class Jonathan asked how much do people spend on other holidays. We started making a list of Holidays and about how much dollars they spend each year.

  • Halloween: 6.9 billion
  • St.Patrick’s day: about 4.6 billion
  • Valentines day: about 19.7 billion
  • Mothers day: about 21.4 billion
  • Fathers day: about 16 billion
  • 4-Day Black Friday Weekend: 5.7 billion
  • Christmas: 465 billion
  • 4th of July: 6.7 billion

That’s a lot of money spent on holidays!!

💡Inspired by our class, we concluded that:

  1. People 👫spend hundreds of billions of dollars on holidays.
  2. They could have saved these money for improving important things for the country and community, or pay off their debts, or save for rainy day/retirement.

The White Lion🦁 | 白狮子

Today in class we talked about the story called “The White Lion”. The young👩 minds remember and tell that story so well.

The story is about a little white lion🦁.

The story began in a dark night where the white lion and his big brother were waiting for their mother to come back with dinner.  They were small cubs. The brother of the white lion went to see if their mother was close by.

But a snake bit his brother and ate him.  The little white lion ran as fast as he could from the snake.  He got lost so he just climbed a tree to rest in for the night.  Meanwhile in a village close by villagers were running out of food. The villagers sent a boy👦🏾 to go to the woods to look for food.

Viz with data/number visualization


“As the cathedral is to its foundation so is an effective presentation of facts to the data” – Willard Cope Brinton

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