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set theory, a set is a collection of objects (called members or elements) that is regarded as being a single object. ... A set A is called a subset of a set B (symbolized by A ⊆ B) if all the members of A are also members of B. For example, any set is a subset of itself, and Ø is a subset of any set.

All people both at school and other places of work always get some time or some period of time when they break up and they go away from their place of work or study to relax. This topic explores activities around holidays with the intention of teaching pupils the behavior, language, and conduct of students in holidays.

The musculoskeletal system provides form, support, stability, and movement to the body. It is made up of the bones of the skeleton, muscles, cartilage, tendons, ligaments, joints, and other connective tissue that supports and binds tissues and organs together. Wikipedia

Africa is the second-largest continent on the planet. It covers 20% of the land surface on earth. It has 54 recognized sovereign nations, two disputed states, and nine territories as shown in the Africa Map. Africa is home to a wide range of wildlife, terrain, and climates. mapsofworld.com


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