One reality is that sometimes the use of equivalent fractions is necessary and we ask the kids to use common denominators as a last resort.
This foldable was created with the students AFTER the investigation and BEFORE the weekly quiz. It was intended to be a summary reference piece. I created it with the intention of it being used as a FLOWCHART. If you look closely, students are asked to try one of the mental strategies at the top and then it is suggested that they move to the bottom of the foldable flowchart if one of the mental strategies did not apply.
{all folded up} {as you open}
{close up of mental strategies-outside}
{close up of mental strategies-inside}
{what to do if one of the mental strategies doesn't work}