Is donating for the construction of schools that teach worldly sciences (such as mathematics, sciences, and languages) considered an ongoing charity (ṣadaqah jāriyah) or beneficial knowledge from which a person benefits after their death, or is this restricted to religious sciences only?

Contributing and donating to schools, hospitals, and other charitable endeavors whose principal remains and whose benefit continues, falls under the category of Sadaqah (definition) Jariyah (ongoing charity). It is not a condition that schools be solely for religious knowledge; rather, it includes all knowledge from which humanity benefits. For charity encompasses all aspects of good that bring benefit to a person, and this includes worldly sciences that benefit people in their lives.