Assistant Language Teachers or ALTs teach English in Elementary, Junior High and Senior High schools all over Japan. Which schools an ALT teaches at will depend on the contracting organisation that the ALT is employed by. In general ALTs employed by municipal Boards of Education teach at Elementary and Junior High, while prefectural ALTs teach at Senior High schools, although exceptions to this rule do occur. Some ALTs are based at a single school (base-school ALTs) while others visit a number of schools in their local area (one-shot ALTs).

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