On average among OECD countries, there are about 14 students. per teacher at the secondary level (Table D2.2). As the differences in student-teacher ratios indicate, there are fewer full-time equivalent students per full-. time equivalent teachers at the secondary level than at the primary level of education.
Pain in the hip area may also originate from painful infections or other conditions of the skin, such as shingles. Hip pain may also occur because of a problem with the back or spine. Depending upon the cause of hip pain, the pain may occur when walking, running, or engaging in activity. Bursitis of one of the two bursae of the hip (sacs that provide cushioning between bones and tissues) can cause hip pain.
Ankylosing Spondylitis 101. AS mainly affects the spine and sacroiliac joints (places where the spine joins the pelvis). Inflammation in these areas can cause back and hip pain and stiffness. Eventually, long-lasting inflammation may lead some bones of the spine, called vertebrae, to fuse together. This makes the spine less flexible and may lead to a stooped-over posture.