Table 3 Number of students participating in study 1 on student learning structured according to the number of complete observations according for each data subset considered: pre- (January) and post-test (June) data, teacher adoption data (at the time of the post-test, June), teacher perception data (at the time of the pre-test, January)

0. Pre-test (January) or post-test (June) data

Grade 3

(\(n_{\text{classes}}=83\))

Grade 4

All grades

1. Pre-test (January) or post-test (June) data

Grade 3

(\(n_{\text{classes}}=74\))—study 1a

Grade 4

All grades

2. Pre-test (January) or post-test (June) data and adoption data

Grade 3

(\(n_{\text{classes}}=55\))—study 1b

Grade 4

All grades

3. Pre-test (January) or post-test (June) data and adoption data and perception data

Grade 3

(\(n_{\text{classes}}=43\))—study 1c

Grade 4

All grades

4. Pre-test (January) or post-test (June) data and perception data

Grade 3

(\(n_{\text{classes}}=55\))—study 1c

Grade 4

All grades