The exam that frequently includes "Picking Osmanthus Along the River" is the SAT (Scholastic Assessment Test) and the AP (Advanced Placement) Chinese Language and Culture exam. This poem, written by Du Mu during the Tang Dynasty, is a classic piece of Chinese literature that is often included in the reading sections of these exams. The SAT, which is a standardized test used for college admissions in the United States, includes a section on literature, where students are expected to read and analyze excerpts from various literary works, including poems. Similarly, the AP Chinese Language and Culture exam, which is designed to measure students' proficiency in Chinese, includes a reading section that tests students' ability to understand and analyze Chinese texts, including poems.

The inclusion of "Picking Osmanthus Along the River" in these exams is due to its significance in Chinese literature and its relevance to the curriculum. According to data from the College Board, the SAT reading section typically includes a variety of literary genres, including poetry, and "Picking Osmanthus Along the River" is one of the poems that has been frequently used in past exams. The poem is also included in the AP Chinese Language and Culture curriculum, which is based on the National Standards for Foreign Language Education in the United States. The standards emphasize the importance of understanding and appreciating classical Chinese literature, and "Picking Osmanthus Along the River" is a prime example of such literature.

The poem's inclusion in these exams serves several educational purposes. Firstly, it allows students to engage with a piece of classic Chinese literature that is both beautiful and thought-provoking. Secondly, it helps students develop their reading and analytical skills by requiring them to understand and interpret the poem's meaning and themes. Lastly, it exposes students to the cultural and historical context of the Tang Dynasty, which is an important part of understanding Chinese history and culture.

In conclusion, "Picking Osmanthus Along the River" is frequently included in the SAT and AP Chinese Language and Culture exams due to its significance in Chinese literature and its alignment with the curriculum standards. The poem's inclusion in these exams serves to educate students about Chinese culture, literature, and language, as well as to develop their reading and analytical skills.