Mental Maths Strategies – Standard 3 Maths

November 4, 2026 Aven Brisail1 Comment

What you will learn

Add quickly by finding compatible numbers that make 10, 100 or 1 000.
Multiply in your head using place value, factoring and tens then units.
Choose the best strategy for a sum and explain it.

Mental maths means working things out in your head, without writing a column sum. Good mental mathematicians do not count faster. They know some clever tricks and pick the right one. Here are six strategies to try.

1. Compatible numbers

Compatible numbers are pairs that are easy to add, such as numbers that make 10, 100 or 1 000. Look for them first.

Worked example 1

36 + 58 + 64

Show me how

Spot 36 + 64 = 100.

100 + 58 = 158.

So 36 + 58 + 64 = 158.

Other pairs: 250 + 750 = 1 000, 45 + 55 = 100, 7 + 3 = 10.

2. Place value

Say the tens or hundreds as words. 4 × 20 is 4 × 2 tens = 8 tens = 80. 3 × 300 is 3 × 3 hundreds = 9 hundreds = 900. 120 ÷ 4 is 12 tens ÷ 4 = 3 tens = 30.

3. Tens then units

Split a number into tens and units (ones). Work with the tens first, then the units, then put them together.

Worked example 2

7 × 23

Show me how

7 × 20 = 140.

7 × 3 = 21.

140 + 21 = 161.

This works for adding too: 47 + 35 is 40 + 30 = 70, and 7 + 5 = 12, so 82.

4. Factoring and doubling

Break a number into factors and multiply in steps. 6 × 8 is 6 × 2 × 4: 12 × 4 = 48. To multiply by 4, double and double again: 4 × 35 is 70, then 140.

Worked example 3

5 × 18

Show me how

18 = 2 × 9.

5 × 2 = 10.

10 × 9 = 90.

5. Equal addends

Equal addends are numbers that are the same. 25 + 25 + 25 + 25 is 4 × 25 = 100. Doubles near doubles help too: 26 + 25 is 25 + 25 + 1 = 51.

Watch out! A common mistake

Do not try one strategy for everything. For 299 + 145, it is quicker to think 300 + 145 = 445, then take 1 away to get 444. Stop and look at the numbers first.

6. Facts to 10 × 10

All of these strategies need your times tables. Keep practising your facts to 10 × 10 in Lesson 11 so that they come quickly.

Try it

TRY ITMental maths trainer

Pick a strategy. Each question shows the quick way after you answer. Try Name the strategy when you are ready.

Let’s practise

Work out each one in your copybook. Open Hint if you are stuck, then open Show answer to check your working.

1. Work out 27 + 45 + 73.

Hint

Which two make 100?

Show answer

27 + 73 = 100, so 145.

2. What is 6 × 30?

Hint

6 × 3 tens.

Show answer

18 tens = 180

3. What is 800 ÷ 4?

Hint

8 hundreds ÷ 4.

Show answer

2 hundreds = 200

4. Work out 6 × 14 using tens then units.

Hint

6 × 10 and 6 × 4.

Show answer

60 + 24 = 84

5. Work out 4 × 45 by doubling.

Hint

Double 45, then double again.

Show answer

90, then 180

6. What is 15 + 15 + 15 + 15?

Hint

4 equal addends.

Show answer

4 × 15 = 60

7. Work out 499 + 238.

Hint

Think of 500.

Show answer

500 + 238 = 738, take 1: 737

8. Which strategy would you use for 125 + 368 + 875? Why?

Hint

Look for a pair that makes 1 000.

Show answer

Compatible numbers: 125 + 875 = 1 000, so 1 368.

Quiz

Lesson quiz: 10 questions

Answer every question, then press Check my answers. Score 8 or more to earn the Mental Maths Master badge.

Recap

Compatible numbers: look for pairs that make 10, 100 or 1 000.
Place value: 4 × 20 = 8 tens = 80.
Tens then units: 7 × 23 = 140 + 21.
Factoring and doubling: 5 × 18 = 10 × 9.
Equal addends: 25 + 25 + 25 + 25 = 4 × 25.
Look at the numbers first, then choose a strategy.

Words to know

mental maths: Working out answers in your head.
Example: I did 50 × 3 by mental maths.
compatible numbers: Numbers that are easy to put together.
Example: 70 and 30 are compatible numbers.
factor: A number that multiplies to make another.
Example: 2 and 9 are factors of 18.
addend: A number being added.
Example: In 5 + 4, the addends are 5 and 4.
strategy: A plan or a clever way to solve a problem.
Example: My strategy was tens then units.

Try it at home

At the market, add the prices of two or three items in your head before the vendor tells you the total.
Mini project: make a poster of your three favourite mental maths strategies, with one example of each.

Test tips

Tips for class tests

Look at the numbers before you start. Is there a pair that makes 100?
Check a mental answer with a different strategy.
Keep your times tables sharp. They make every strategy faster.

For parents and teachers

After this lesson, your child should be able to:

use compatible numbers within 1 000;
use place value, factoring, tens then units and equal addends to calculate mentally;
recall facts to 10 × 10 and choose and explain a strategy.

These are the mental strategies named in the guide. Ask your child to say how they did a sum. There is often more than one good way, and explaining it builds number sense.

Quiz scores and badges are saved only in this browser on this device. Nothing is sent anywhere. If the browser data is cleared, or another device is used, the badges will be lost.

Previous: Multiplication and Division Word Problems – Standard 3 Maths
Next: Equivalent Fractions and Lowest Terms (coming soon)
Course: Standard 3 Maths

Updates

2026/11/04
– First version of this lesson.

Attributions to media used in this post:

Abacus actually in use at kimono shop in Otaru.jpg – Syced – CC0 1.0 (via Wikimedia Commons)

Multiplication and Division Word Problems – Standard 3 Maths

November 4, 2026November 4, 2026 Aven Brisail2 Comments

What you will learn

Decide whether a word problem needs multiplication or division.
Solve rate problems: per hour, per day, per week and per month.
Use the unitary method, make sense of remainders and check with an estimate.

Word problems hide the maths inside a story. Your job is to find the numbers, decide what to do with them, work it out and then check that the answer makes sense. In this lesson the stories are about pay, prices, sharing and packing, all in TT dollars.

Multiply or divide?

Read the story twice. Ask: am I putting equal groups together, or splitting a total into equal groups?

Multiply when you know one group and how many groups: each, every, per, a day, a week, in all.
Divide when you know the total and need one share or the number of groups: share, equally, each get, how many in each, how many boxes.

Rates: per hour, per day, per week

A rate is an amount for each hour, day, week, month or year. If you know the rate, multiply to find the total. If you know the total, divide to find the rate.

Worked example 1

Mr Mohammed earns $45 an hour. He works 8 hours. How much does he earn?

Show me how

The rate is $45 for each hour, for 8 hours.

8 × $45 = 8 × 40 + 8 × 5 = 320 + 40 = $360.

He earns $360.

Worked example 2

Ms Charles is paid $1 400 for 4 weeks. How much is that each week?

Show me how

Total ÷ number of weeks.

$1 400 ÷ 4 = $350.

She is paid $350 a week.

Remember: 1 week = 7 days, 1 year = 12 months, 1 hour = 60 minutes. A phone plan at 3 cents a minute costs 3 × 20 = 60 cents for 20 minutes.

The unitary method

Unitary means one. First find the value of one, then multiply to find any number.

Worked example 3

5 exercise books cost $40. How much do 8 cost?

Show me how

One book: $40 ÷ 5 = $8.

Eight books: 8 × $8 = $64.

8 exercise books cost $64.

What does the remainder mean?

In a story, think about what the remainder means. 50 children go on a trip and each maxi taxi takes 12. 50 ÷ 12 = 4 r 2. Four taxis are full, but the 2 children left over still need a ride, so you need 5 taxis. If you are filling boxes of 12 cakes from 50, only 4 boxes are full.

Watch out! A common mistake

Do not just copy the number from the division. Read the question again: does it ask for full groups, for groups needed for everyone, or for what is left over?

Check with an estimate. For 48 × 6, think 50 × 6 = 300. An answer of 288 is close, but 2 880 is far too big.

Try it

TRY ITWord problem workout

Solve story problems about pay, prices, taxis and boxes. Read each one carefully before you choose.

TRY ITNumber story builder

Pick a story and the numbers, then tell someone the number story and work it out. Open Show the working to check.

Let’s practise

Work out each one in your copybook. Open Hint if you are stuck, then open Show answer to check your working.

1. A gardener earns $60 a day. How much does he earn in 5 days?

Hint

Multiply: 5 × $60.

Show answer

$300

2. Keisha is paid $480 for 4 weeks. How much is that each week?

Hint

Divide: $480 ÷ 4.

Show answer

$120

3. Internet costs $199 a month. How much for 3 months?

Hint

3 × $199 is about 3 × $200.

Show answer

$597

4. 6 bottles of juice cost $42. How much do 9 bottles cost?

Hint

Find one bottle first: $42 ÷ 6.

Show answer

$7 each, so 9 cost $63.

5. 75 children go to the zoo. A bus holds 20. How many buses are needed?

Hint

75 ÷ 20 = 3 r 15. Do the 15 children stay home?

Show answer

4 buses

6. A baker has 100 rolls and packs them in bags of 8. How many full bags?

Hint

100 ÷ 8 = 12 r 4.

Show answer

12 full bags, with 4 rolls left over.

7. Ravi says 52 × 4 = 2 008. Use an estimate to check.

Hint

52 is about 50.

Show answer

50 × 4 = 200, so 2 008 is too big. The answer is 208.

8. Write a number story for 6 × $25 = $150.

Hint

Use the words each or a day.

Show answer

For example: A taxi fare is $25 a day. In 6 days I spend $150.

Quiz

Lesson quiz: 10 questions

Answer every question, then press Check my answers. Score 8 or more to earn the Problem Solver badge.

Recap

Multiply to put equal groups together. Divide to share or make equal groups.
Rate: an amount per hour, day, week, month or year. Total = rate × time.
Unitary method: find the value of one, then multiply.
Decide what the remainder means in the story.
Estimate to check that your answer makes sense.

Words to know

rate: An amount for each hour, day, week or other unit.
Example: The rate is $40 a day.
per: For each.
Example: Bananas cost $2 per pound.
unitary method: Finding the value of one first.
Example: I used the unitary method to price 7 pens.
equally: In the same amounts.
Example: We shared the money equally.
reasonable: Makes sense and is close to the estimate.
Example: 208 is a reasonable answer for 52 × 4.

Try it at home

Ask an adult about a weekly or monthly bill, such as bus fare or phone credit. Work out what it costs for a month or a year.
Mini project: plan a class trip for 35 children. Choose maxi taxis that take 12 or buses that take 30. How many do you need, and which leaves fewer empty seats?

Test tips

Tips for class tests

Underline the numbers and circle the key words: each, per, share, equally, in all.
Write a number sentence before you work it out.
After dividing, read the question again to decide what the remainder means.

For parents and teachers

After this lesson, your child should be able to:

decide whether a word problem needs multiplication or division;
solve rate problems by the hour, day, week, month and year, and by the minute in cents;
use the unitary method, interpret remainders and check with an estimate.

As the guide asks, money is in whole dollars or whole cents only. Real bills, pay slips or price lists from home make the stories feel real. Ask your child to explain how they got each answer.

Quiz scores and badges are saved only in this browser on this device. Nothing is sent anywhere. If the browser data is cleared, or another device is used, the badges will be lost.

Previous: Division and Remainders – Standard 3 Maths
Next: Mental Maths Strategies – Standard 3 Maths
Course: Standard 3 Maths

Updates

2026/11/04
– First version of this lesson.

Attributions to media used in this post:

Fishing Boat, King’s Wharf, San Fernando, Trinidad and Tobago.JPG – Kalamazadkhan – CC BY-SA 3.0 (via Wikimedia Commons)

Multiplying Bigger Numbers – Standard 3 Maths

November 4, 2026November 4, 2026 Aven Brisail1 Comment

What you will learn

Multiply by 10 and 100, and by multiples of 10 such as 30.
Use the area model to split a number into tens and ones.
Multiply in columns by a 1-digit number, and 2 digits by 2 digits.

Now that you know your facts to 10 × 10, you can multiply much bigger numbers. The secret is to split a big number into tens and ones, multiply each part with a fact you know, and add. The column method does the same thing in a short, tidy way.

Times 10, times 100 and tens

When you multiply by 10, every digit moves one place to the left and a 0 fills the ones place: 34 × 10 = 340. Times 100 moves the digits two places: 34 × 100 = 3 400.

To multiply by 30, think 3 × 10. So 6 × 30 = 6 × 3 × 10 = 18 × 10 = 180.

The area model

Split the bigger number into tens and ones. Multiply each part, then add the parts. This is how the column method works.

	20	3
4	80	12

Worked example 1

23 × 4

Show me how

Split 23 into 20 and 3.

20 × 4 = 80 and 3 × 4 = 12.

80 + 12 = 92. So 23 × 4 = 92.

The column method

Write the 1-digit number under the ones. Multiply the ones first. If the answer is 10 or more, write the ones digit and carry the tens to the next column. Add the carried number after you multiply that column.

	Th	H	T	O
		2	4
		3	4	7
×				6
	2	0	8	2

Worked example 2

347 × 6

Show me how

Ones: 7 × 6 = 42. Write 2, carry 4.

Tens: 4 × 6 = 24, plus 4 carried = 28. Write 8, carry 2.

Hundreds: 3 × 6 = 18, plus 2 carried = 20. Write 20.

The answer is 2 082.

Watch out! A common mistake

Multiply first, then add the carried number. In 347 × 6 the tens column is 4 × 6 + 4 = 28, not (4 + 4) × 6 = 48.

2 digits by 2 digits

For 34 × 26, multiply by the 6 ones, then by the 2 tens, and add the two lines. On the second line write a 0 in the ones first, because you are multiplying by 20.

	H	T	O
		3	4
×		2	6
	2	0	4
+	6	8	0
	8	8	4

Worked example 3

34 × 26

Show me how

34 × 6 = 204.

34 × 20 = 680. Write the 0, then 34 × 2 = 68.

204 + 680 = 884. So 34 × 26 = 884.

Try it

TRY ITColumn multiplication stepper

Work through each sum one step at a time. The yellow column is the one you are working on.

TRY ITArea model and tens

Split a number into tens and ones, or multiply by 10, 100 or a multiple of 10.

Let’s practise

Work out each one in your copybook. Open Hint if you are stuck, then open Show answer to check your working.

1. What is 56 × 10?

Hint

A 0 goes on the end.

Show answer

560

2. What is 7 × 40?

Hint

7 × 4 = 28, then × 10.

Show answer

280

3. Use the area model for 36 × 5.

Hint

30 × 5 and 6 × 5.

Show answer

150 + 30 = 180

4. Work out 48 × 7 in columns.

Hint

Ones: 8 × 7 = 56. Write 6, carry 5.

Show answer

336

5. Work out 1 205 × 4.

Hint

Remember the 0 tens: 0 × 4 + carried.

Show answer

4 820

6. A school orders 24 boxes of chalk. Each box has 12 sticks. How many sticks?

Hint

24 × 12: 24 × 2, then 24 × 10.

Show answer

48 + 240 = 288 sticks

7. Work out 53 × 31.

Hint

53 × 1, then 53 × 30.

Show answer

53 + 1 590 = 1 643

8. Tim says 62 × 3 = 1 806. What did he do wrong?

Hint

Did he carry correctly? 62 is 60 + 2.

Show answer

He wrote 18 and 6 side by side. 60 × 3 = 180 and 2 × 3 = 6, so 62 × 3 = 186.

Quiz

Lesson quiz: 10 questions

Answer every question, then press Check my answers. Score 8 or more to earn the Multiplication Builder badge.

Recap

Times 10: a 0 on the end. Times 100: two zeros.
Split numbers into tens and ones, multiply each part, then add.
Column method: multiply the ones first, carry, and add the carried number after multiplying.
2 digits by 2 digits: multiply by the ones, then by the tens (write the 0 first), then add.

Words to know

multiple of 10: A number you get by multiplying by 10, such as 30 or 70.
Example: 40 is a multiple of 10.
area model: A rectangle split into parts to help you multiply.
Example: I used an area model for 23 × 4.
carry: Move a ten to the next column.
Example: 7 × 6 = 42, so I wrote 2 and carried 4.
long multiplication: Multiplying by a 2-digit number with two lines and adding them.
Example: 34 × 26 is long multiplication.
estimate: A close answer found quickly.
Example: 62 × 3 is about 60 × 3 = 180.

Try it at home

Count the eggs, juice boxes or tins in a pack. Work out how many there would be in 12 packs.
Mini project: plan a class bake sale with trays of 12 cupcakes. Work out how many cupcakes 15, 24 and 35 trays make.

Test tips

Tips for class tests

Estimate first: 48 × 7 is about 50 × 7 = 350. Your answer should be close.
Keep the digits in straight columns and write carried numbers small.
In long multiplication, do not forget the 0 on the second line.

For parents and teachers

After this lesson, your child should be able to:

multiply by 10, 100 and multiples of 10;
multiply 2-, 3- and 4-digit numbers by a 1-digit number in columns;
multiply 2 digits by 2 digits using the area model or long multiplication.

The guide asks for multiplication up to 2 digits by 2 digits. The 3- and 4-digit by 1-digit work stays below 10 000. Squared paper helps to keep the columns straight.

Quiz scores and badges are saved only in this browser on this device. Nothing is sent anywhere. If the browser data is cleared, or another device is used, the badges will be lost.

Previous: Multiplication Facts to 10 × 10 – Standard 3 Maths
Next: Division and Remainders – Standard 3 Maths
Course: Standard 3 Maths

Updates

2026/11/04
– First version of this lesson.

Attributions to media used in this post:

Tray of Chocolate Muffins.jpg – Ceeseven – CC BY-SA 4.0 (via Wikimedia Commons)

Multiplication Facts to 10 × 10 – Standard 3 Maths

November 4, 2026November 4, 2026 Aven Brisail2 Comments

What you will learn

Show a multiplication fact as equal groups and as an array.
Know the times tables from 2 × 1 up to 10 × 10.
Use turn-around facts and facts you know to find harder ones.

Multiplication is a quick way to add equal groups. Instead of adding 4 + 4 + 4 + 4 + 4, you can say 5 groups of 4, or 5 × 4 = 20. In this lesson you will build arrays, learn tricks for each times table and practise the facts up to 10 × 10 until they come quickly.

Equal groups and arrays

The sign × means times or groups of. In 3 × 5 = 15, the numbers 3 and 5 are factors and 15 is the product.

An array is a set of objects in equal rows. Count the rows, count how many are in one row, then multiply.

3 rows of 5 = 3 × 5 = 15

Worked example 1

A tray of sweet bread buns has 4 rows with 6 buns in each row. How many buns are there?

Show me how

There are 4 rows of 6.

Skip count in 6s: 6, 12, 18, 24.

4 × 6 = 24 buns.

Turn-around facts

Turn an array on its side and you get the same number of dots. So 3 × 5 and 5 × 3 are both 15. This means you only need to learn about half of the facts. If you know 8 × 2 = 16, you also know 2 × 8 = 16.

Watch out! A common mistake

Do not mix up × and +. 4 × 3 means 4 groups of 3, which is 12. It is not 4 + 3 = 7. Read the sign before you answer.

Tricks for each table

Use what you already know to find harder facts:

× 2: double the number. × 4: double, then double again.
× 5: the answer ends in 0 or 5. × 10: put a 0 on the end.
× 9: work out × 10, then take one group away. 9 × 7 = 70 − 7 = 63.
× 3, × 6, × 7, × 8: build from a fact you know. 6 × 7 = 5 × 7 + 7 = 35 + 7 = 42.

Worked example 2

What is 8 × 6?

Show me how

8 × 6 is double 4 × 6.

4 × 6 = 24, and double 24 is 48.

So 8 × 6 = 48.

Worked example 3

What is 9 × 8?

Show me how

10 × 8 = 80.

9 groups is one group less: 80 − 8 = 72.

So 9 × 8 = 72.

Try it

TRY ITTimes table practice

Practise the facts up to 10 × 10. Pick one table or All. The timed round is optional and only compares you with your own best.

TRY ITArray builder

Add or take away rows and columns to build the array, then check it. Or match an array to its number sentence.

Let’s practise

Work out each one in your copybook. Open Hint if you are stuck, then open Show answer to check your working.

1. What is 7 × 4?

Hint

Double 7, then double again.

Show answer

2. An array has 5 rows of 8 chairs. How many chairs?

Hint

5 × 8. Count in 8s five times.

Show answer

40 chairs

3. You know 6 × 9 = 54. What is 9 × 6?

Hint

Turn-around facts give the same product.

Show answer

4. Use 10 × 7 = 70 to find 9 × 7.

Hint

Take one group of 7 away.

Show answer

70 − 7 = 63

5. Fill the box: 8 × = 56.

Hint

Count in 8s until you reach 56.

Show answer

7, because 8 × 7 = 56.

6. A packet holds 6 crackers. How many crackers in 9 packets?

Hint

9 × 6.

Show answer

54 crackers

7. Which is bigger: 7 × 8 or 6 × 9?

Hint

Work out both. 7 × 8 = 56.

Show answer

7 × 8 = 56 is bigger than 6 × 9 = 54.

8. Write two multiplication facts for an array of 4 rows of 10.

Hint

Turn the array round.

Show answer

4 × 10 = 40 and 10 × 4 = 40.

Quiz

Lesson quiz: 10 questions

Answer every question, then press Check my answers. Score 8 or more to earn the Times Table Star badge.

Recap

× means groups of. In 4 × 5 = 20, 4 and 5 are factors and 20 is the product.
An array has equal rows. Rows × number in each row = total.
Turn-around facts: 3 × 8 = 8 × 3.
Use facts you know: double for × 4 and × 8, × 10 then take one group for × 9.

Words to know

multiply: To add equal groups quickly.
Example: When we multiply 4 by 3 we get 12.
factor: A number that is multiplied.
Example: In 6 × 4 = 24, 6 and 4 are factors.
product: The answer to a multiplication.
Example: The product of 5 and 6 is 30.
array: Objects set out in equal rows and columns.
Example: The chairs made an array of 5 rows of 6.
times table: A list of the multiples of one number.
Example: I said the 7 times table to Granny.

Try it at home

Look for arrays at home: egg cartons, tiles, windows, a box of juice. Say the multiplication fact for each one.
Mini project: make your own times-table chart from 1 × 1 to 10 × 10 on a sheet of paper. Colour all the turn-around pairs the same colour.

Test tips

Tips for class tests

If you forget a fact, build it from one you know. Do not guess.
Check the sign. × and + give very different answers.
Learn the hard ones first: 6 × 7, 6 × 8, 7 × 8, 8 × 8, 7 × 9.

For parents and teachers

After this lesson, your child should be able to:

explain multiplication as equal groups and arrays;
recall multiplication facts up to 10 × 10;
use turn-around facts, doubling and known facts to work out others.

Short, regular practice works best: five minutes a day of mixed facts. The timed round is optional and only compares a child with their own best score on this device, never with other children.

Quiz scores and badges are saved only in this browser on this device. Nothing is sent anywhere. If the browser data is cleared, or another device is used, the badges will be lost.

Previous: Money Problems: Bills, Best Buy, Profit and Loss – Standard 3 Maths
Next: Multiplying Bigger Numbers – Standard 3 Maths
Course: Standard 3 Maths

Updates

2026/11/04
– First version of this lesson.

Attributions to media used in this post:

Egg cartons with chicken eggs 03.jpg – Krzysztof Golik – CC BY-SA 4.0 (via Wikimedia Commons)

Solar panels on a roof.jpg – Pujanak – Public domain (via Wikimedia Commons)

1. Compatible numbers

2. Place value

3. Tens then units

4. Factoring and doubling

5. Equal addends

6. Facts to 10 × 10

Try it

Let’s practise

Quiz

Mental maths strategies: worksheet

Part A: Let’s practise

Part B: Quiz

Answers (for the adult)

Recap

Words to know

Try it at home

Test tips

Updates

Attributions to media used in this post:

Multiply or divide?

Rates: per hour, per day, per week

The unitary method

What does the remainder mean?

Try it

Let’s practise

Quiz

Multiplication and division word problems: worksheet

Part A: Let’s practise

Part B: Quiz

Answers (for the adult)

Recap

Words to know

Try it at home

Test tips

Updates

Attributions to media used in this post:

Times 10, times 100 and tens

The area model

The column method

2 digits by 2 digits

Try it

Let’s practise

Quiz

Multiplying bigger numbers: worksheet

Part A: Let’s practise

Part B: Quiz

Answers (for the adult)

Recap

Words to know

Try it at home

Test tips

Updates

Attributions to media used in this post:

Equal groups and arrays

Turn-around facts

Tricks for each table

Try it

Let’s practise

Quiz

Multiplication facts: worksheet

Part A: Let’s practise

Part B: Quiz

Answers (for the adult)

Recap

Words to know

Try it at home

Test tips

Updates

Attributions to media used in this post: