Dear Educator: The following lab center is designed to teach a difficult concept easily. Each of my centers is aligned to the 2018 Science TEKS, asks a well-defined question, gives you a list of the equipment needed, and provides an answer key. Each lab center includes a writing prompt. They are formatted on separate pages so that you can mix and match, use some, or use all. The lab center can be used to introduce or review a concept. Print the pages one time and laminate, making them reusable. Pull the everyday items one time and keep in your classroom for easy access. A key is included. Allow the students to self-check, if you chose. They are versatile enough to be used for differentiating. My students loved using these and my administrators were always impressed with the results. Enjoy!