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.

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.

United Arab Emirates (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.

Ukraine (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.

Uganda (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.

Turkmenistan (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.

Turkey (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.

Tunisia (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.

Trinidad and Tobago (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.

Tonga (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.

Togo (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.

The Gambia (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.

Thailand (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.

Tanzania (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.

Taiwan (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.

Switzerland (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.

Sweden (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.

Suriname (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.

Sri Lanka (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.