These notes coincide with the Experimental Design PowerPoint. It was designed to help my students with their mastery of the experimental design questions found in Objective 1: Nature of Science on the TAKS test in Texas. It helps students understand how to identify the independent and dependent variables, constants, hypothesis, control group and the conclusion. It also emphasizes that factors that can keep a hypothesis or conclusion from being valid (emotions, opinions, random sampling, and large sample size).