Big Idea:A little over a week into a systems unit, it's important to take a little time to meet kids where they are and assess where they're at. Today's work will serve as a springboard to the next few days.
Big Idea:It’s amazing to get to the point where students truly understand how useful and beautiful algebra can be. Transitioning from graphing systems to solving by substitution is an opportunity to get kids there.
Big Idea:Often the truest solution to a problem is that "it depends". Substitution is an efficient method for finding the precise intersection of two lines; a graph makes it clear what happens on either side of that point.