This site from the Capital Community College helps with paragraph development and topic sentences.

The most effective vocabulary instruction teaches word meanings as concepts; it connects the words being taught with their context and with the students' prior knowledge. Six techniques have proven especially effective: Concept...

This slideshow tutorial focuses on adjusting writing style to fit the audience. It looks at audience characteristics and discusses how to adapt the vocabulary, sentence style, and tone to fit them. It provides an example using the topic...