This Dichotomous Key is meant to be used with the Safari LTD "Dinosaur Skulls Toob" (approx. $12; https://www.safariltd.com/products/view/toobs-dinosaur-skulls-figurines-687404). This lab allows students to identify physical characteristics on the skull models and use those characteristics for classification. This activity also explores how dichotomous keys are made and the difficulty of using one with specimens with different juvenile/adult forms or that change season to season.
UPDATE: I have added an additional handout that could be laminated and given 1 per group. It has some graphics and outlines the specific characteristics the students are looking for a little better.
Classification - Dinosaur Skull Dichotomous Key
by Matthew L Gibson
is licensed under a Creative Commons Attribution-NoDerivs 3.0 Unported License