| Regina Ovodenko - Vol. 41 Num. 3 (2021) | ||
| Stepped tasks for complex problem solving: top-down-structured mathematical activity ABSTRACT | 30-35 | |
| Regina Ovodenko - Vol. 41 Num. 3 (2021) | ||
| Stepped tasks for complex problem solving: top-down-structured mathematical activity ABSTRACT | 30-35 | |