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In page Model minority:

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However, not all is grim for Southeast Asian American students. Certain Southeast Asian ethnic groups have shown greater progress compared to others and resemble the success of other more established Asian Americans.[4] As cited a case study,[4] Vietnamese American students are beginning to show similar rates of academic success comparable to East Asian American students. Among Southeast Asian American students, Vietnamese American students are recognized as having the highest academic performance, whereas Cambodian American students have the poorest performance.[4] Among Cambodian and Vietnamese refugees, despite enduring similar immigration hardships, differences in academic success can be attributed to structural and cultural factors.[4]