These guidelines should be used discreetly and with acknowledgment that each pupil is an individual whose sight will vary.
Sharing is impossible.
Enlarging material will often help, although good contrast may suffice. It is often facing and near to the board, they should not sit to one side. Allow the use of prescribed tinted glasses, cap, hat, or eyeshade to reduce the effects of glare. The light should be behind the student and directed onto the object being viewed. Matte surfaces for walls, boards, and paper prevent light reflection and glare.