Most countries mandate science as a compulsory subject in elementary and secondary schools. The reasons vary from country to country, but all acknowledge the importance of science and technology in our world, and many argue that performing well in science is critical to economic development in a global economy. While the evidence of a direct relationship between science education and global competitiveness is sketchy at best, most curriculum guides assert the relationship. In addition, aims of science education are two pronged: the education of future scientists, and the education of a knowledgeable public that lives, works, and votes (in some cases) in a world infused with science and technology. The recognized importance of both these aspects has resulted in a recent slogan in science education: science for all.