Recently I went through Teradata training right from my home. It was the best training I have ever had. It was very live with hands on and wasn't like online training itself. It also had case studies so that you will get the utmost exposure and confidence.
If you are looing for to learn Teradata (includeing DW and SQL concepts), you can contact none other than:
And please see these demo videos and the feedbacks if you are still not convinced.