Walking (1) Teaching--Aids and devices (1) Teaching (1) Research, Industrial (1) Public domain (1) Production (Economic theory) (1) Possibility (1) Multilingualism (1) Memory (1) Media programs (Education) (1) Language and education (1) Land tenure (1) Government property (1) Gait in humans (1) French (1) Books (1) Awareness (1) Arousal (Physiology) (1) Multilingual education (1) Languages (1) Science (1) Students (1) Lengua de enseñanza (1) Investigación industrial (1) Posibilidad (1) Material didáctico (1) Ciencias (1) Lenguas (1) Lenguaje (1) Producción (1)