The Teiid Designer project provides a number of document formats for learning how to fully utilize all of it's VDB and data modeling features. This document contains a number of links to "how to..." perform a number of useful tasks and use-cases.
Model JDBC data source (guide)
Model Flat File data source (guide)
Model and test virtual procedures
Consume SOAP web service (guide)
Create a REST war (guide)
Reconce column mappings in your transformation
Video's