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.
Common sources of the symptom include overexertion/over-exercising, improper gait, poor posture, sedentary lifestyle, etc. What many do not realize is that much lower back pain can be traced back to the muscles of the hip; that is, when the hip flexor muscles are overly tight, they can lead to pain in the lower back. There is, indeed, a relationship, between lower back pain and tight hip flexor muscles and this will be elucidated below.