To be an effective guide on the side, plan for every aspect of the project while remaining open to student ideas, needs, and understanding. (edutopia.org)
Use the color guide on the side of the box to determine if your cat's urine has a high pH level, which is indicative of possible urinary health issues. (pettao.com)
The other option is more of a guide - track, that is attached to the floor and had guides on either side of the door to keep it from swinging. (shadesofblueinteriors.com)