This dataset is in wide format and has data from two timepoints: Wave 1 (W1, fall, beginning of school year) and Wave 2 (W2, spring, end of school year). Variables that are consistent across the 2 waves are labeled with YEAR1. One special characteristic about this dataset is that there are both (a) original variables associated with the larger, overarching study from which these data originate, and (b) variables created specifically for this sub-project (e.g., standardized scores, dummy variables, replicated variables). These are clearly identified within the data dictionary for this sub-project.