Improve prep 2 note

Author: chrisbay

class-prep/2/README.md

@@ -6,4 +6,4 @@ currentMenu: classes
 Task | Resource Type | Link | Instructions
 |----|---------------|------|-------------|
 Read | C# For Python Programmers | [Control Flow](../../csharp4python/control-flow/) | Learn about conditionals and loops in C#
-Watch | C# For Absolute Beginners | [Working With Collections](https://mva.microsoft.com/en-us/training-courses/c-fundamentals-for-absolute-beginners-16169?l=XIMI21QIC_2406218949) | *NOTE:* This video assumes that you've already been introduced to objects. It will be replaced by a less dependent section on data structures in *C# For Python Programmers*.
+Watch | C# For Absolute Beginners | [Working With Collections](https://mva.microsoft.com/en-us/training-courses/c-fundamentals-for-absolute-beginners-16169?l=XIMI21QIC_2406218949) | *NOTE FOR INSTRUCTORS AND TFS:* This video assumes that you've already been introduced to objects. It will be replaced by a less dependent section on data structures in *C# For Python Programmers*.