The document analyzes writing samples from a 3rd grade student named Jiayu who recently moved to the US from China. It identifies common grammatical errors in her writing related to articles, verbs, and subject-verb agreement. These errors are typical for Mandarin Chinese speakers learning English because Mandarin does not have articles, verbs do not change form, and there is no subject-verb agreement. Despite the errors, Jiayu is making good progress in learning English in the short time since her arrival from China.