Do you have your students write a conclusion paragraph for every lab? I did last year, but have been considering having my students write one for every 3 or 4 labs. I am hoping to reduce the quantity and improve the quality of the conclusion paragraphs. I am thinking about structuring 2-3 labs per quarter that are used as a formative assessment and have the students edit (then perhaps re-edit) their labs to produce a thorough analysis of the experiment. So, I am curious what other science teachers are doing.