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.
Some types of arthritis and cancer can contribute to back pain. Improper lifting. Using your back instead of your legs can lead to back pain. Psychological conditions. People prone to depression and anxiety appear to have a greater risk of back pain. Smoking. This can keep your body from delivering enough nutrients to the disks in your back. Prevention