In a large bowl, combine yeast, warm water, and a pinch of sugar. Let sit for about 5 minutes until frothy.
Add flour, salt, and olive oil to the yeast mixture. Stir until the dough begins to come together.
Knead the dough on a lightly floured surface for about 8-10 minutes until smooth and elastic.
Place the dough in a greased bowl, cover, and let rise until doubled in size, about 1 hour.
Preheat oven to 475°F (245°C).
Punch down dough and divide it into 8 equal pieces. Roll each piece into a ball, then flatten and roll into circles about 1/4 inch thick.
Place pitas onto a baking sheet and bake for about 5-7 minutes, or until puffed and lightly golden.
Remove from oven and cover with a towel to keep them soft. Serve warm or allow to cool completely.