This posting is for a lab and set of worksheets for the topic of cell respiration. It includes all of the necessary background/discussion information, laboratory instructions and materials list. There is also a reflection worksheet asking the students to identify independent and dependent variables, their controls, analyze the outcome of their experiment, graph the results and do a flaws analysis. It is definitely designed for guiding students through analytical thinking and help them develop critical thinking skills. In addition to that, it illustrates the often confusing point that cell respiration happens in both plants and animals!