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California International Online School (CAINTOS), a private online American English Language school based in Southern California, United States of America, will open in July, 2024.

California International Online School will offer a low-cost, comprehensive, multi-level English language literacy program for international English Learners including initial English language-level testing, personalized online English skill building, online courses, regular online office hours for student check-ins and support, webinars, and participation certificates.

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