(music plays)

Shahana stands next to a wall touch screen showing the title of a lesson. She is in her twenties, with shoulder-length brown hair. She wears a blue T-shirt with a print that reads "Home Work Zone."

She says HI, TVO KIDS, I'M
TEACHER SHAHANA
AND I'M HERE
TODAY TO SHOW YOU
HOW TO FIND THE
MISSING NUMBER
IN AN
EQUATION.
I KIND OF LIKE TO
THINK OF THIS
LIKE
SOLVING A MYSTERY.
SO LET'S PUT ON OUR
DETECTIVE HATS
AND
GET STARTED.
LET'S REMIND
OURSELVES AT
FIRST WHAT
AN EQUATION IS.
AN EQUATION IN
MATH IS LIKE
A
NUMBER SENTENCE.
SO FOR EXAMPLE,
OVER HERE,
I HAVE
TWO PLUS TWO
EQUALS ONE PLUS
THREE.
IF YOU
NOTICE,
THIS SIDE OF
THE EQUATION;
TWO PLUS
TWO EQUALS FOUR,
AND THIS SIDE OF
THE EQUATION IS
ONE PLUS
THREE, WHICH ALSO
EQUALS FOUR.
SO BOTH SIDES OF
THE EQUATION
ARE
EQUAL.

She clicks on a top menu and an exercise appears.

She continues HERE'S ANOTHER
SIMPLE EQUATION,
BUT THIS TIME, WE
HAVE A MYSTERY
NUMBER
TO SOLVE.
SOMETHING PLUS
TWO, EQUALS
ONE
PLUS FIVE.
NOW IF YOU
LOOK AT
THE
EQUATION CLOSELY,
I THINK WE CAN
PROBABLY
FIGURE
OUT...
THIS SIDE OF
THE EQUATION.

She circles 1 plus 5 and continues ONE PLUS FIVE
EQUALS SIX, RIGHT?
SO, SOMETHING PLUS
TWO, EQUALS SIX.
EASY
ENOUGH.
NOW IN ORDER TO
CONTINUE
SOLVING
THE REST OF IT,
WE CAN IMAGINE THE
EQUATION ON
A SCALE.

A scale pops up.

She continues SO FAR,
REMINDER,
WE HAVE SOMETHING
PLUS TWO
EQUALS SIX.
SO WHAT I'LL
DO IS I'M GOING
TO PLACE TWO COUNTERS
ON THIS SIDE
OF
THE EQUATION.
ON THE OTHER SIDE
OF THE EQUATION,
I HAVE
A SIX.
SO I'M GOING
TO TAKE
ONE, TWO,
THREE, FOUR, FIVE,
SIX COUNTERS
OVER THERE.
NOW THIS
LOOKS KIND OF FUNNY
BECAUSE OUR SCALE
IS UNBALANCED.
WHAT WE HAVE
TO DO IS FIGURE OUT
HOW MANY MORE
COUNTERS TO
ADD TO THIS
SIDE IN ORDER
TO MAKE BOTH
SIDES EQUAL.
SO AGAIN,
WE HAVE TWO
ON THAT SIDE,
AND I'M GOING TO
ADD SOME MORE.
LET'S SEE HOW MANY
MORE WE NEED TO ADD.
ONE, TWO...
THREE...
AND FOUR.
AND VOILA,
IT LOOKS LIKE
BOTH SIDES OF
THE SCALE
ARE NOW EQUAL.
SO OUR MISSING
NUMBER IS FOUR.
NOW, LET'S
DOUBLE CHECK BEFORE
WE WRITE IN OUR
ANSWER.
WE STARTED
OFF WITH SOMETHING
PLUS TWO EQUALS
ONE PLUS FIVE.
WE FOUND
OUT THAT OUR
MISSING NUMBER
IS FOUR.
SO WHAT WE
CAN DO THEN IS...
CHECK THIS SIDE OF
THE EQUATION.
FOUR PLUS
TWO EQUALS SIX,
AND THEN CHECK
THE OTHER SIDE
OF THE
EQUATION,
ONE PLUS FIVE ALSO
EQUALS SIX.

She completes the steps mentioned and continues YEP, BOTH
SIDES ARE EQUAL.
MYSTERY
SOLVED.
NOW,
REMEMBER THESE
IMPORTANT RULES
EVERY TIME
YOU'RE
SOLVING AN EQUATION.

A caption reads "Both sides should be the same or equal in the end. Double check the total on both sides of the equation."

She concludes ONCE YOU'RE
DONE.
TVO KIDS,
I'M TEACHER
SHAHANA AND I HOPE
YOU CAN SOLVE
THE CLUE TO
THE MISSING
NUMBER IN AN
EQUATION THE
NEXT TIME.