Critical Friends: Wreck-It
My first college lab report really humbled me when it was handed back covered in red ink – my professor was asking for a lot of revisions. However, this feedback was crucial to my development as a scientist, and I want to expose my students to the feedback and revision loops I experienced before they had off to more advanced schooling. Students learn to give and receive feedback during the Critical Friends review period that occurs at the end of big labs. At this stage in the class each group presents their lab results to another group using Wikispaces digital portfolios, and then makes an argument as to how their results answer the lab’s guiding question. Classmates then offer targeted feedback during the Wreck-It portion of Critical Friends, before each group reconvenes to make necessary edits to their work. Students love when they get to play devil’s advocate and present critical “wreck-it” counter-points to other groups' arguments. It’s important to remind students to also offer advice on how to improve the other groups’ portfolio and help them build a more cohesive argument. Each group then reconvenes and makes the necessary edits to their work. Adding more critical eyes to student work makes my job as a teacher more manageable, and guarantees improved overall lab report quality. My goal is that by the time my students take college chemistry or organic chemistry, they will have already had experience assessing the validity of lab analyses and improving experimental design, data collection, and other crucial lab components.
The freedom to design, implement, and showcase science labs can be a daunting task for high school sophomores. We end each year in my class with a month of self-paced group projects aimed at constructing an experiment that will test hypothesis around a subject of students' choice. Anything from crime scene investigation, to the chemistry of ice cream preparation, to the reactions involved in instant hand warmers is fair game during this unit. Students collect data that answers their hypothesis and create a website to display their findings. Having a publicly visible product makes sharing the results of student findings easy, and helps them contribute to the scientific community at large. At the same time, it helps hold them accountable to a higher quality of work, knowing anyone, anywhere, can see the incredible things they've created.
Synthesizing a year's worth of content is difficult for any student, so I always look for innovative new ways to keep my students engaged attempt to conquer all of the learning objectives in chemistry. During the 3 weeks leading up to the final exam, my classroom temporarily turns into a Chemistry Hunger Games war zone where students battle to "kill" off districts - each representing a different unit from the year. Using the chemistryhungergames.com website I designed, my students pour over videos, screencasts, text, images, simulators, and practice problems that prepare them for district assessments. Each student is allowed to take the district assessment as many times as needed to master the district’s content, and I rotate enough questions to make about 5 assessment versions for each district. Point values are assigned according to the proficiency level they achieve on their assessments - all of which are tracked online using a conditionally formatted google sheet to help monitor progress. This gamified twist to the learning process keeps students focused on the ultimate task, mastery of content, while also helping to reinforce that with enough practice and guidance, they have the ability to master anything.
Getting high school students to collaborate effectively can be tricky, though certain digital tools do a great job of making teamwork more seamless. Groups in my class keep document their lab activities using video recording, Youtube, and Google Apps for Ed, and compile Wikispaces digital portfolios with their work (see “Lab Documentation” strategy). Before submitting final drafts students engage in a Critical Friends review period where groups present their portfolios and offer critical feedback. First, each group gets Portfolio Preparation planning time where they can revisit the data they’ve collected, make sure all charts, tables, graphs, images, and videos are accurate, and pair them with solid written analyses. Labs are power learning activities, but oftentimes students are too busy trying to “complete work” instead of reflecting on the meaning of their results. Groups exhibit better teamwork when they have time allotted specifically to prepare portfolios, ultimately leading to more polished lab reports and focused class time.