Valladolid (1) Universities and colleges (1) Teaching (1) Students (1) Strategy (1) Science (1) Sampling (1) Reproduction (1) Pollination (1) Pollen (1) Plants--Reproduction (1) Plants (1) Preschool teachers (1) Learning, Psychology of (1) Initials (1) Flowers (1) Elementary school teachers (1) Education--Research (1) Education (1) Drawing (1) Design (1) Concepts (1) Concept learning (1) Belief and doubt (1) Angiosperms (1) Anatomy (1) Pedagogía--Investigación (1) Plantas--Reproducción (1) Polinización (1) Toma de muestras (1)