Assistant principals help school principals with general administrative tasks. These vary from district to district and even school to school, but broadly fall into the areas of planning, coordinating services and maintaining order.n order to become an assistant principal, your surest path is to accumulate teaching experience and then earn a master's degree in education leadership or education administration.
Causes of a ruptured, or perforated, eardrum may include: 1  Middle ear infection (otitis media). 2  A middle ear infection often results in the accumulation of fluids in your middle ear.3  Pressure from these fluids can cause the eardrum to rupture. Foreign objects in your ear. 2  Small objects, such as a cotton swab or hairpin, can puncture or tear the eardrum. 3  Severe head trauma. 4  Severe injury, such as skull fracture, may cause the dislocation or damage to middle and inner ear structures, including your eardrum.
A hole in the eardrum can be caused by: 1  a middle ear infection, if pus builds up inside your ear and puts pressure on your eardrum. 2  an injury to the eardrum, such as a severe blow to the ear or poking an object such as a cotton bud deep into the ear. 3  a sudden loud noise, such as a loud explosion.