Let's Start at the Very Beginning-Opening Lines
All About Sports
Olympic Games
Parts of Speech
A Little Bit of Math
100

Where's Papa going with that axe?

Charlotte's Web

100

This game includes throwing a ball into a basket.

Basketball

100

This event includes running over barriers for about 100 meters.

100 meter hurdles

100

This is generally a person, place, thing, or idea.

Noun

100

This type of operation includes taking away from each other.

Subtraction
200

There is no lake at Camp Green Lake.

Holes

200

This game includes trying to hit a ball with bat.

Baseball

200

This event includes jumping off a board.

Diving

200

This is an action word.

Verb

200

This is the number of degrees for an acute angle.

Less than 90 degrees.

300

First of all, let me get something straight, this is a JOURNAL, not a diary.  

Diary of a Wimpy Kid

300

This game includes throwing and kicking a ball.  

Football

300

This event involves flips and somersaults.   

Gymnastics

300

These are two types of describing words.

Adjective and Adverb

300

This is a number that is less than 0.

A negative number

400
The sun did not shine.  It was too wet to play.  So we sat in the house.  All that cold, cold, wet day.  

The Cat in the Hat

400

This game includes hitting a ball with your hands over a net.

Volleyball

400

This event includes a variety of jumping skills.

Triple jump

400

These take the place of nouns.

Pronouns

400

This number starts with 1 and ends with one hundred zeroes or 10,000,000,000,000,000,000,000,000,000,000,000, 000,000,000,000,000,000,000,000,000,000,000,000, 000,000,000,000,000,000,000,000,000,000.

Googol

500

If you are interested in stories with HAPPY ENDINGS you would be better off reading some other book.  

A Series of Unfortunate Events

500

This game includes hitting a ball with your head and feet.

Soccer

500
This event includes an equine partner being put through their paces.  

Dressage

500

These sometimes combine 2 sentences into one sentence.

Conjunctions

500

This is a number that is only divisible by itself and 1.

Prime number