I used this mid-way review for my grade 3's Magnetism unit in Science.
The review is brief and focuses on 3 main topics:
-Poles of a magnet and how they react to each other
There is also a true or false section at the end. You may modify/alter the true or false questions to suit your class' needs as I have uploaded the file as a Word Document, but please respect my right to creating and sharing the resource.