Question: Cut a slot into the end of the wood.
Option 0: Once you have drawn the slot on the wood with pencil lay it on a flat surface. Hold the wood down with a your hand and use a hand saw to cut around your pencil marks.
Option 1: Once you have drawn the slot on the wood with pencil lay it on a flat surface. Hold the wood down with a clamp and use a jigsaw to cut around your pencil marks.
Answer: 1