If you’re going to switch, buy Living History Threads from Faith Builders. My students absolutely love it. You will get all the geography you want plus incredible life-changing stories. And I’m going to predict you may end up squeezing in more time than you thought. I’ve sometimes read the assigned stories for story time or used extra stories for devotions. My children cheer. We use it in Grades 1-4, also combining two grades. I suggest you starting by buying first and third grade, then you could do half of each one year and the other half the next. Your students will grow from any time spent in this course.