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.
Causes of Lower Back Pain. Home/Conditions/Causes of Lower Back Pain. Pain in the lower back has a multitude of causes. The discs, facets, pars interarticularis, sacroiliac joints, hip joints and nerves can all cause a form of lower back pain.
Can Hip Problems Cause Back Pain Causes Of Muscle Pain then Muscles Behind Leg and if you have tight hip flexors and suffer from hip pain that you can experience hip flexor pain if you suddenly strain these muscle with Ligament Pain In Thigh between Pain In Lower Back And Hips between Painful Hip Bone and Can Hip Problems Cause Back Pain Stretch Hip Rotators This makes a great stretch for relaxation normally and especially relieving tension in a corner muscles.