Before getting started, whisk together the active dry yeast, warm water and sugar in a large mixing bowl or in the bowl of a stand mixer, and let it proof for about 5 minutes, or 'til foamed up.
Once the yeast has proofed, start by adding 3 & 1/2 cups of flour and the salt to the mixture, stirring 'til well combined. Add a little more flour as needed, up to 4 cups or 'til a stiff dough forms.*
Knead the dough for about 10 minutes, or 'til a smooth surface forms, adding more flour as needed. The dough hook attachment for the electric stand mixer works well for this step.
Once your smooth dough has formed, put your homemade bagel dough back into the mixing bowl, cover with a tea towel, and then leave it to rest in a warm place for about 1 hour, or 'til doubled in size.
While the dough rests, preheat your oven to 425ºF, and line 2 13x18 baking sheets with parchment paper.
Place the everything bagel seasoning in a bowl big enough to fit the dough.