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Environmental measures and forms (school, classroom, and home).
| Measure | Baseline (Oct–Nov) |
Randomization | Follow-up 1 (Dec–Feb) |
Follow-up 2 (Mar–Jun) |
|---|---|---|---|---|
| School Contact and Demographics Form | X | |||
| School/Classroom Evaluation | X | X | X | |
| School Environmental Samples | X | X | X | |
| Home Environmental Samples-Vacuum Dusta | ⇠ | – | ⇢ |
One home dust sample is taken at any time during the year as a surrogate measure for home exposure
