Who Gets to Do the Flame Test?
In an eleventh-grade chemistry class of 31, you plan a flame-test inquiry to identify metal ions. The lab has eight benches fixed at 36 inches; only one is height-adjustable, and the sink is at the front. A student who uses a wheelchair has an IEP requiring full participation in lab activities. A student with asthma has a 504 plan specifying avoidance of respiratory irritants, and the methanol burners produce fumes. An emergent bilingual student is grouped with three students who consistently take the equipment and answer for the group. The principal suggests having the three students 'watch a video and complete a worksheet' to reduce risk and crowding. Your budget allows one new piece of equipment or a paraprofessional for two periods per week. The safety contract requires goggles and no loose sleeves.
1. Evaluate the principal's suggestion that the three students watch a video and complete a worksheet. What are the equity, safety, and learning issues, and what decision do you make?
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The suggestion solves crowding and perceived risk for the school, but it segregates three students from the inquiry and denies them the very practices the lab is designed to teach. For the student with the IEP, full participation is an individual-plan issue, not a favor; a video-only substitution would need to be justified as the least restrictive option, and it is not. For the student with asthma, the relevant question is exposure: methanol burners produce irritants, so the safe answer is not 'watch' but 'reduce or eliminate the exposure'-use a fume hood, a low-emission alternative, small sample sizes, and pre-arranged access to the nurse's plan. For the emergent bilingual student, the issue is group dominance, not capability; a worksheet would compound it. I would keep all three in the lab with a risk assessment, move the accessible station near the sink and fume hood, and use the one height-adjustable bench for the wheelchair user, not as a teacher demonstration table. I would not use the paraprofessional as a substitute for the student's hands; the aide can support materials and safety. If the fumes cannot be controlled, I would switch to a microscale or spectroscope-based version for the whole class, not only for the disabled students.
2. Design the lab so all three students can participate meaningfully. Include station layout, group roles, safety controls, and language supports.
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Station layout: place two accessible benches-one height-adjustable at 30–34 inches and one near the fume hood-with clear 36-inch turning space. Put the methanol burner only in the fume hood; use a microscale version with a cotton swab and a small alcohol flame in the hood to lower emissions. Provide a camera mounted over the hood connected to a monitor so students who cannot stand at the hood can see color while a partner performs the flame step; the wheelchair user can still prepare the wire loop, record, and make decisions. Safety: goggles for all, hair tied, no loose sleeves, asthma inhaler at the station, nurse aware, fume hood fan checked, and a no-open-flame alternative if the hood fails.
Group roles rotate every 10 minutes: materials manager, safety officer, recorder, and evidence challenger. Give the emergent bilingual student the recorder or evidence-challenger role first with a bilingual color chart and sentence frames ('The unknown is ____ because the flame was ____'). Pre-teach the vocabulary with pictures. The teacher does not take over; the paraprofessional supports access, not answers. After the lab, each student writes an individual claim-evidence-reasoning paragraph.
3. How will you assess individual learning from this group investigation? Include at least two sources of evidence and explain how you avoid penalizing students for accommodation-related differences.
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Use multiple sources: (1) an individual lab notebook with raw observations, a labeled data table, and a CER paragraph; (2) a 3-minute oral defense in which each student explains one unknown identification and answers a 'what if' question, such as 'What would you expect if the unknown were potassium?'; (3) an exit ticket with a new unknown spectrum or flame color. The group product is scored for collaboration and safety, not for the science grade, so one student's domination does not inflate others' scores. For the student with the IEP, the oral defense is an accepted mode, and the notebook can use a template; the construct is identifying ions from evidence, not handwriting speed. For the emergent bilingual student, I accept the CER in Spanish or with a bilingual glossary and score the reasoning, not English syntax; if needed, the oral defense is conducted with a bilingual support person. For the student with asthma, if the class uses the monitor station for the flame step, the assessment still asks them to interpret the color evidence they observed and to explain the safety rationale. Accommodations change access, not the target: all students must use evidence to justify an identification.