Before you cut the apples be sure you peel them first. Once peeled then you will use a sharp knife to cut the apple into fourths and cut the core out of the middle.  Once it is in quarters and cored then cut slices that are about ¼ inch thick. This will ensure you make the perfect baked apple pie.  When cutting the apples it is especially important that you cut your apples evenly, so none of the apples become mushy or undercooked when its baking.