US Educational Terms Glossary (Garland Green)

School assignment that has a real-world application. Such tasks bear a strong resemblance to tasks performed in nonschool settings (such as the home an organization or the workplace) and require students to apply a broad range of knowledge and skills. Often they fill a genuine need for the students and result in a tangible end product.

The number of students in classes divided by the number of classes. Because some teachers, such as reading specialists, have assignments outside the regular classroom, the average class size is usually larger than the pupil-teacher ratio. (Ed Source)

The total number of days of student attendance divided by the total number of days in the regular school year. A student attending every school day would equal one ADA. Generally, ADA is lower than enrollment due to such factors as transiency, dropouts, and illness. A school district's revenue limit income is based on its ADA. (Ed-data)