I typically purchase my yeast in bulk. But if you are using the 0.25-ounce packets, they each contain 2.25 teaspoons of yeast. So you will need slightly more than one packet to yield 1 tablespoon.
How to knead the dough by hand:
If you do not have a stand mixer, no prob! For step 5 (mixing the dough), simply stir the dry ingredients into the dough as much as possible. Then turn the dough out onto a floured surface and knead by hand for 5 to 7 minutes until smooth, adding up to 1/4 cup of extra flour if the dough is too sticky.