Half a month to a month or more. You don't want the students to speed through it and not learn much, so I'd say a month sounds good. I took my time and did it in 2-3 months.

How often were you working on it?

Roughly 1 section every 2-3 days. There are 17 sections, so it took between 34-51 days.

This course took my 8th grade students approximately 9 weeks to complete. Some students work faster than others and some were working on it outside of class, but in a 40 minute class period 5 days a week, it took somewhere around 9 weeks to complete.

Honestly up to how determined your students are. I spent quite a bit of time working at it at  1-2 hours a day it took me about a week to get through it. But if you want to take your time at a more comfortable pace I would say around 2-3 months would be good