Choose a backpack with wide, padded shoulder straps and a padded back. The backpack should sit snugly on the child's upper back, at least 2 inches above the waist.
Pack light. Organize the backpack to use all of its compartments. Pack heaviest items closest to the center. The backpack should never weigh more than 10 to 20 percent of the student's body weight.
Always use both shoulder straps. Slinging a backpack over one shoulder can strain muscles. Wearing a backpack over one shoulder may also increase curvature of the spine.
Consider a rolling backpack. This type of backpack may be a good choice for students who must tote a heavy backpack. Remember that rolling backpacks must still be carried up stairs, and may be difficult to roll in the snow.