Russia (Video and Exercises) This material contains a worksheet that can be worked on with the help of a linked short explanatory video. The same material is also available with additional information text.

Senegal (Video and Exercises) This material contains a worksheet that can be worked on with the help of a linked short explanatory video. The same material is also available with additional information text.

United Kingdom (Video and Exercises) This material contains a worksheet that can be worked on with the help of a linked short explanatory video. The same material is also available with additional information text.

Tuvalu (Video and Exercises) This material contains a worksheet that can be worked on with the help of a linked short explanatory video. The same material is also available with additional information text.

United States of America (Video and Exercises) This material contains a worksheet that can be worked on with the help of a linked short explanatory video. The same material is also available with additional information text.

Venezuela (Video and Exercises) This material contains a worksheet that can be worked on with the help of a linked short explanatory video. The same material is also available with additional information text.

Vietnam (Video and Exercises) This material contains a worksheet that can be worked on with the help of a linked short explanatory video. The same material is also available with additional information text.

Comoros (Video and Exercises) This material contains a worksheet that can be worked on with the help of a linked short explanatory video. The same material is also available with additional information text.

Angola (Video and Exercises) This material contains a worksheet that can be worked on with the help of a linked short explanatory video. The same material is also available with additional information text.

Antigua and Barbuda (Video and Exercises) This material contains a worksheet that can be worked on with the help of a linked short explanatory video. The same material is also available with additional information text.

Afghanistan (Video and Exercises) This material contains a worksheet that can be worked on with the help of a linked short explanatory video. The same material is also available with additional information text.

Albania (Video and Exercises) This material contains a worksheet that can be worked on with the help of a linked short explanatory video. The same material is also available with additional information text.

Algeria (Video and Exercises) This material contains a worksheet that can be worked on with the help of a linked short explanatory video. The same material is also available with additional information text.

Andorra (Video and Exercises) This material contains a worksheet that can be worked on with the help of a linked short explanatory video. The same material is also available with additional information text.

Belarus (Video and Exercises) This material contains a worksheet that can be worked on with the help of a linked short explanatory video. The same material is also available with additional information text.

Bangladesh (Video and Exercises) This material contains a worksheet that can be worked on with the help of a linked short explanatory video. The same material is also available with additional information text.

Barbados (Video and Exercises) This material contains a worksheet that can be worked on with the help of a linked short explanatory video. The same material is also available with additional information text.

Belgium (Video and Exercises) This material contains a worksheet that can be worked on with the help of a linked short explanatory video. The same material is also available with additional information text.

Bahrain (Video and Exercises) This material contains a worksheet that can be worked on with the help of a linked short explanatory video. The same material is also available with additional information text.

Bahamas (Video and Exercises) This material contains a worksheet that can be worked on with the help of a linked short explanatory video. The same material is also available with additional information text.