Preheat your oven to 350°F (175°C). Line a baking sheet with parchment paper.
In a medium bowl, whisk together the flour, baking soda, cinnamon, and salt. Set aside.
In a large bowl, cream the softened butter, brown sugar, and granulated sugar until light and fluffy.
Beat in the eggs one at a time, then stir in the vanilla extract.
Gradually add the dry ingredients to the creamed mixture, mixing just until combined.
Stir in the oats and chocolate chips using a spatula or wooden spoon.
Drop tablespoon-sized portions of dough onto the prepared baking sheet, spaced about 2 inches apart.
Bake in the preheated oven for 10-12 minutes, or until the edges are golden brown. Let cool on the baking sheet for a few minutes before transferring to wire racks to cool completely.
Notes
For a variation, try adding nuts or dried fruit to the dough before baking.