For a child entering 5th grade in Lower Saxony, what are the key differences between a Realschule and an Oberschule, specifically regarding their primary educational goals and the highest school-leaving qualifications obtainable after 10th grade at each school type?
Navigate to the 'Unsere Schulen' section. From 'Unsere Schulen', navigate to 'Allgemein bildende Schulen'. Locate and extract the educational focus and grade levels for 'Realschule'. Navigate to the 'Oberschule' page (from 'Allgemein bildende Schulen' or the Oberschule link within the 'Allgemein bildende Schulen' content) and extract its educational focus and grade levels. Navigate to the 'Abschlüsse im Sekundarbereich I' page. Identify and extract the highest qualifications obtainable after the 10th school year that are applicable to both Realschule and Oberschule.
State that a Realschule covers grades 5-10 and provides an extended general education focused on practical relevance and independent learning. State that an Oberschule covers grades 5-10, can have or lack a 'gymnasiales Angebot', and aims to provide a basic, extended, or in-depth general education, enabling students to continue their education professionally or academically. Confirm that both Realschule and Oberschule can lead to the 'Sekundarabschluss I – Realschulabschluss' and 'Erweiterter Sekundarabschluss I' after the 10th school year.