Sequence of units

I am considering buying one 9 week unit to try the program. We are homeschooling our fifth grader for the first time due to Covid. He is definitely a hands on learner and needs to be actively engaged so this curriculum seems like a good fit for us. I've been trying to cobble together resources but think I need a structured curriculum. Can I change the order of presentation of the units? I think the third unit in the 9-11 on exploration fits with what we've started So far and will be the u it he enjoys the most to him to get excited about homeschooling. I just don't know if the units are sequential and build on each other.

Thank you!

Some of the language arts lessons build on one another but there should be no great problem doing them a bit out of order. May families use our curriculum as unit studies and have no issues. Do what you feel is best for your child and family.