In a large bowl, mix together flour, cinnamon, baking soda, and salt. Set aside.
Drop rounded balls of dough onto prepared baking sheets, the size of 3 tablespoons each, spacing them 5 inches apart. Bake for 13-15 minutes, until cookies just begin to brown at the edges and center is still soft. Cookies will appear undone and moist in the center, but will continue to bake on the warm baking sheet. Allow to cool for 10 minutes in pan, then transfer cookies to a wire rack to cool completely.