Changes [Nov 17, 2017]Adding Assignments ...
Under Power Teacher Grade book 2.3 If the screen is not wide enough (resolution too low) the Reports TAB does not appear.
Make sure the grade book is full screen... click on the open square in the upper right corner to go full screen
See image below
You may be able to fix this by Narrowing the classes pane at the left.
Place the mouse on a line between the clases pane and the right pane and a double arror will appear <-> then click and drag left to shring the classes pane.
If this does not fix the problem then the Reolution of the screen must be set higher than 800x600.
Thanks to Mr. VanCamp and Mrs. Zayack for helping us find a solution to this problem.