Table 5 Frequency of concepts mentioned in students’ responses to the open-ended questions
From: The teaching of evolutionary theory and the Cosmos–Evidence–Ideas model
Concepts | TLS 1 group | TLS 2 group | ||
|---|---|---|---|---|
Pre | Post | Pre | Post | |
Environment/different conditions | 7 | 11 | 9 | 8 |
Heredity | 1 | 5 | 3 | 4 |
Common descent | 2 | 4 | 1 | 8 |
Time scale/evolution unit | 1 | 2 | 1 | 7 |
Mutations | 6 | 9 | 2 | 12 |
Genetic recombination | 0 | 0 | 0 | 1 |
Random selection/genetic drift | 0 | 0 | 0 | 3 |
Diversity | 0 | 0 | 2 | 0 |
Natural selection | 0 | 5 | 0 | 14 |