Clarify the different types of phrases and clauses that young writers can use to vary their sentence structure. A helpful slideshow presentation encourages your class to fix sentences by adding more interesting phrases and clauses,...

This handy information sheet shows young grammarians how to distinguish among main, subordinate, relative, and noun clauses. 

Dependent, independent, coordination, and subordination. Everything you wanted to know about clauses, but were afraid to ask, recorded on this two-page information sheet.