Khan Academy

Ellipses (K-A)

Hyphens versus dashes (K-A)

Meet the comma (K-A)

Punctuating lists (K-A)

Three ways to end a sentence (K-A)

Commas and introductory elements (K-A)

Commas in space and time (K-A)

Salutations and valedictions (K-A)

Appositives (K-A)

BONUS VIDEO – The Oxford comma (K-A)

Commas in dialogue (K-A)

More uses for commas (K-A)

Apostrophes and plurals (K-A)

Introduction to the apostrophe (K-A)

Introduction to contractions (K-A)

Advanced (plural) possession (K-A)

Introduction to the possessive (K-A)

Possession for words ending in “s” (K-A)

BONUS VIDEO – History of the possessive apostrophe (K-A)

BONUS VIDEO – History of the apostrophe (K-A)

Choosing between its and it’s (K-A)

Pronoun-antecedent agreement (K-A)

Subject-verb agreement (K-A)

Recognizing fragments (K-A)

Run-ons and comma splices (K-A)