Prof. Dina Stachel developed the Matal early science education programme.
Her publications include:
"Solid is something hard - The Concepts Solid and Liquid: Development and Learning", with R Stavy, book published by Ramot Pub. Co., Tel Aviv Univesity, Isreal, 1986, (in Hebrew).
"MATAL: the Israel Elementary Science Project--a Retrospective", with E Kaplan et al, in International Journal of Science Education, 1980.