where do commas go?
coordinate adjectives
listing
coordinating conjunctions
100

Today I'm baking a cake with flour cocoa eggs milk and butter for my mom dad and siblings.

(double points)

Today, I'm baking a cake with flour, cocoa, eggs, milk, and butter for my mom, dad, and siblings.

100

The swimmer had long continuous strokes.

The swimmer had long, continuous strokes.

100
In gym today we could pick to play basketball or baseball or soccer or tennis.

leave it be. 

100

Maddie wanted to help out her friend with her math homework but she had to go to swim practice.

Maddie wanted to help out her friend with her math homework, but she had to go to swim practice.

200

Ryder needs to get ready for school pack his lunch and finish his homework before the school bus comes.

Ryder needs to get ready for school, pack his lunch, and finish his homework before the school bus comes.

200

Many students failed the Antigony test because it was long difficult and frustrating.

Many students failed the Antigony test because it was long, difficult, and frustrating.

200

Hudson can either do homework hang with friends or cry during his 7th off today and he chose homework.

Hudson can either do homework, hang with friends, or cry during his 7th off today, and he chose homework.

(fanboy)

200

Taylor’s mother came to bring her a bag for the sleepover she forgot clothes but brought a pillow.(double points)

Taylor’s mother came to bring her a bag for the sleepover; she forgot clothes but brought a pillow. 

300

Arguably orange juice is far superior to apple juice but Carly disagrees.

Arguably, orange juice is far superior to apple juice, but Carly disagrees.

300

Jessica is a fun energetic high school student.

Jessica is a fun, energetic high school student.

300

I don't know whether to order pizza or pasta or maybe lasagna from Grubhub tonight.

I don't know whether to order pizza or pasta or, maybe, lasagna from Grubhub tonight.

300

We opened Romeo and Juliet and Tommy read a chapter aloud.

no change.

400

Joaquin is forced to answer questions in class however he doesn't pay attention.

Joaquin is forced to answer questions in class, however, he doesn't pay attention.

400

Azan's cat's names are Mow Alberto Alberta Cookie Cream Spiderman and Vanilla may she rest in pieces.

Azan's cat's names are Mow, Alberto, Alberta, Cookie, Cream, Spiderman, and Vanilla, may she rest in pieces.

400

Julia likes watermelon and strawberries and bananas but she hates blueberries blackberries and apples.

Julia likes watermelon and strawberries and bananas, but she hates blueberries, blackberries, and apples.

400

Amy wants to get a good grade in English so she is going to study for the final.

Amy wants to get a good grade in English, so she is going to study for the final.