Krnel, D., Watson, R. and Glažar, S. A. (1998). Survey of research related to the development of the concept of ‘matter’. International Journal of Science Education, 20(3), 257-289.
Marek, E. A. (1986). They misunderstand, but they’ll pass. The Science Teacher, 32–35.
Krnel, D., Watson, R. and Glažar, S. A. (1998). Survey of research related to the development of the concept of ‘matter’. International Journal of Science Education, 20(3), 257-289.
Marek, E. A. (1986). They misunderstand, but they’ll pass. The Science Teacher, 32–35.