Chinese Language for Young Learners is a series of six textbooks and six workbooks that were used in Singapore schools as a second language curriculum. Hanyu pinyin is used in this series. (Hanyu pinyin is the most commonly used system for the romanization of the Chinese "written sound". Hanyu pinyin has been the national standard of China since 1958, and an international standard ( ISO 7098:1991, 2nd ed.) since 1982).
Chinese Language for Young Learners is ideal as a second language curriculum.