Optical invisibility or cloacking

Watch the following video and, without cheating, try to explain how they manage to achieve the "invisibility effect".

Had you heard about it before?

Alan Turing

 

Today would have been Alan Turing's 101st birthday. He died at age 41.

Voice recognition lift

How about some fun?

Vocabulary Unit 1 to Unit 4

Let's keep revising. Now vocabulary:

• a Food and restaurants
• b Sport
• c Personality
• d Money
• e Transport and travel
• f Appearance
• g Education
• h Houses

Revision Unit 4

Click on the following links and practice:

• Lesson A first conditional and future time clauses + when, until, etc. (1)
• Lesson A first conditional and future time clauses + when, until, etc. (2)
• Lesson B first and second conditional
• Lesson B second conditional
• Lesson C usually and used to (1)
• Lesson C usually and used to (2)
• File 4 Lesson C get
• File 4 A visit from a pop star

SUPER MOON

Had you heard about the following?

The largest and closest full Moon of 2013 will occur on June 23rd. It won't be this close again during a full Moon phase until August 2014.

More info: http://bit.ly/13yHrEs

Technology Addiction can affect the brain

Watch the following video and do the comprehension activities below. After that, it would be really interesting to read about your opinions as regards this topic.

You may also share you score by sending it to my account. My nickname is "sunshine".