The 2026 freshmen will enroll in Tangpu High School in the fall of 2025. This is based on the standard academic calendar in the United States, which typically starts with the freshman class in the fall semester of their senior year in high school. Given that the 2026 freshmen would be entering their senior year in the fall of 2025, it is logical to assume that they would begin their freshman year at Tangpu High School in the following fall semester, which is 2025.

The enrollment process for high schools in the United States usually follows a structured timeline. Students are typically expected to apply for high school during their eighth-grade year, with applications due by the end of the school year. This allows schools to plan for the incoming class and allocate resources accordingly. Once accepted, students are informed of their enrollment status, and they are expected to confirm their attendance by a specified deadline. This process ensures that schools have a clear understanding of their incoming class size and composition well in advance of the academic year.

Data from the National Center for Education Statistics (NCES) supports this timeline. According to the NCES, the majority of high schools in the United States follow a traditional calendar with a fall semester starting in August or September and ending in December or January. The spring semester typically begins in January or February and concludes in May or June. This calendar aligns with the assumption that the 2026 freshmen will enroll in Tangpu High School in the fall of 2025.

Additionally, the timeline for enrollment is further solidified by the fact that most high schools have a set of deadlines and procedures for incoming freshmen. For example, the application process for Tangpu High School may involve submitting an application, attending an informational meeting, and completing any required assessments or interviews. These steps are usually completed during the eighth-grade year, which precedes the freshman year.

In conclusion, the 2026 freshmen will enroll in Tangpu High School in the fall of 2025, based on the standard academic calendar in the United States and the typical enrollment process for high schools. The National Center for Education Statistics provides data that supports this timeline, and the structured application process for Tangpu High School further confirms the expected enrollment date.