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Across 1. the branch of mathematics dealing with the properties and manipulation of numbers. 4. The subjects comprising a course of study in a school. 6. A long passage in a building from which doors lead into compartments. 7. A pass of an examination or an official completion of a course,especially one conferring status as a recongnized practitioner of a professeion. 9. Coming between two things in the,place,charater,etc. 13. give intellectual,moral,and social instruction,typically at a school or university. 15. The activity of acting. 16. Historical an official document or charter. 17. A board for displaying notices. 19. An official list or record of names or items. 20. A school that is funded by the state and for which no fees are charged. 21. Information technology.

Down 1. not present in a place,at an occasion,or as part of something. 2. an official document attesting a fact. 3. Schoolwork that a pupil do at home. 5. Mathematics the successive application of functions to a variable the value of the first function being the argument of the second. 8. The partical study of plants,animal,and natural phenomena as a school subject. 10. A short piece of writing on a particular subject. 11. be entitled to a particular benefit or privilege by fulfilling a necessary condition. 12. A practice of taking and processing photographs. 13. relating to the rudiments of a subject. 14. A person who teaches something. 18. Write a word or symbol in order to give information.