This site briefly defines the predicate noun, provides an example, and lists several sources.

This section of an online grammar guide from the University of Calgary provides a review of and an interactive exercise on identifying how clauses function in sentences (as nouns, adjectives, or adverbs).

In this learning module, students will learn more about various sentence structures. Reinforcement worksheets are provided. This module is designed to support Tier I, Tier II, and Tier III students via different instructional options.

Printable information is provided that demonstrates how to identify a phrase in the context of a sentence.