Add note on alternative score reporting for memory test

Add an instructor note suggesting a more anonymous alternative to writing your score in the etherpad.

Author: ndporter

episodes/05-memory.md

@@ -52,6 +52,28 @@ the material as well as if we present small amounts of information interspersed
 practice opportunities. This is yet another reason why going slowly and using
 frequent formative assessment is important.
 
+:::::::::::::::::::::::::::::::::::::::  instructor
+
+For a semi-anonymous alternative to having learners write their score in the etherpad on the challenge below, you can create a list with numbers and have people add X's. This also makes it easier to see the score distribution.
+
+*Example:*
+
+- 0
+- 1
+- 2
+- 3
+- 4
+- 5
+- 6
+- 7
+- 8
+- 9
+- 10
+- 11
+- 12+
+
+:::::::::::::::::::::::::::::::::::::::
+
 :::::::::::::::::::::::::::::::::::::::  challenge
 
 ## Test Your Working Memory