Our book: New Cutting Edge Upper-Intermediate

Yes that's why we chose purple for our title bar.  It matches.  Our book also has a corresponding website at this address:
http://www.pearsonlongman.com/newcuttingedge/upper-intermediate/

We started Unit 1 on Monday, the 10th and basically we stayed on the first Grammar point.  We reviewed the "Intermediate" verb forms for storytelling:

Present

• Simple
• Continuous
• Perfect
• Perfect Continuous

Past

• Simple
• Continuous
• Perfect

Past Perfect gave the most trouble so here's a little refresher from English Page: 

http://www.englishpage.com/verbpage/pastperfect.html

This website has helped almost all of our school's fastest learners come to grips with grammar.

The internet can and should be your best source for new English.  It isn't nearly as fun as figuring English out with people, unfortunately.