-Although feedback from our industrial affiliates, who compare
-students having used Pintos to students having taken courses
-that use less concrete or external approaches, is highly favorable,
-we need to perform a formal evaluation comparing learning
+Although we have received highly favorable feedback from our
+industrial affiliates, who compare students having used Pintos
+to students having taken courses that use less concrete or external approaches,
+we need to perform a formal evaluation to compare learning