LEQ: How can learning English grammar and usage enhance my written and oral communication?

Grammar Bytes presentations
The following link contains worksheets and information linked to the Writing & Grammar text:
Prentice Hall Writing & Grammar

The following links contain grammar games for you to play and use to practice:
Basic Skills Practice Games
Game Zone
Grammar Bytes!
Sentence Clubhouse
Preposition Desert
eflnet Grammar
The Teacher's Cafe