The Grant for Instructional Improvement asks that teachers test for an increase in student knowledge following their lesson(s) incorporating the mural. This worksheet for viewing the mural can help you and your students feel successful if it's used as a pre-test and post-test because the learning curve is likely to be extremely good! It will also help the students focus on what they're going to learn. Just explain that you don't expect them to know the answers but to write what they know. Later, after viewing the mural, they'll have another chance. You may want to adapt the tests or create one of your own to meet your particular course objectives.

a simple version of the test
answers to the test
a more challenging test
recipe for a great learning curve