The World Health Organization says that all cities and towns should have a minimum of 9 square meters (m2) of green space per person. In Latin America there are 3.5 m2 per capita. What is it like in your town?

Take a look at the garbage bin in your school or home. Have you ever wondered what makes its content garbage? If you look inside, you may see that the waste at the bottom of the bin is made up of items that are no longer of use and therefore have been tossed out. You may also find materials that are of mixed composition (made of glass, paper, metal, organics, and the like). Breathe in deeply, and you may notice an unpleasant odor.

How much energy do you think is needed to light and mobilize all the machines and devices operating on the planet? Have you ever thought that by turning on a light in your house or school you are impacting the environment and emitting gases into the atmosphere?

There is nothing more stimulating than deciding to improve the space in which one lives and. In so doing, one can change the way one lives. Doing this alone, while possible, is extremely difficult. Doing it as a group isa great experience! Many traditional communities have social arrangements that facilitate collaborative work, such as indigenous communities in many Latin American and Caribbean villages. In Mexico this collective form of work is known as tequio; the inhabitants of a place come together to carry

Even though there is plenty of water on earth, not all of it is suitable for consumption. One out of every five people does not have access to safe drinking water, and 40 percent of the planet's population lacks basic sanitation systems.

Educational spaces, apart from their functionality and efficient use of natural resources, should be conducive to learning and offer comfort and security to the people entering them. This requires construction and maintenance processes that keep in mind both the occupants and the environmental conditions that surround them.

Have you thought about what your life will be like in 10 or 15 years? Surely you have imagined yourself being happy, moving around your favorite spaces, working on what you like, and enjoying beautiful plants and clean and fresh air. How is your lifestyle today affecting your chances of enjoying such a future?

The implementation of educational policies and practices is closely linked to the assessment of student learning, as it enables the monitoring of progress and achievements, the improvement of teaching in the classroom, the improvement of policies and the assessment of program effectiveness, among many other objectives. To ensure that assessment achieves its purposes, it is essential to make an appropriate choice of the learning assessment instruments to be used.