It’s going to depend on if you want a different method of math taught. All the different curriculums come at math concepts different ways. You could find something that is more independent but would your child be getting the foundation they are getting with RS. [no offense meant to people using other math curriculums….just something to consider]
You don’t mention the levels your children are in. Some have suggested setting a timer and that works well.
Another suggestion is to focus on the oldest, make sure they get their lesson every day. Then with the other two, depending on levels, you could alternate days. So it would look like this.
Oldest….daily lessons with a timer set for 30 minutes
Next oldest….lessons on Mon, Wed. and Fridays…..with a timer set for 30 minutes. They can do their worksheets on the “non lesson” days
youngest child….lessons on Tues. and Thurs. [and then alternate the yougest two the next week so the youngest is getting a lesson on M,W, and F…..while the next oldest does lessons on T, & Th.]
OR…you teach a lesson each day to the two oldest and the youngest will do a lesson every other day?? And set the timer for 20 minutes for all so you will be teaching math for all three for 1 hour.
On the days one of the children don’t have a lesson they can play a game with the oldest child while you are teaching one of the other children.
If you teach a lesson every other day, with playing a game in between, it will take an extra year to go through the levels. Unless you continue this through the summer.
Also….look at the other work your children are doing. Can you do something more independent in other subjects?
One last option….have dad teach one of the children their math in the evenings.
Hope you are able to continue with RS!