On this page, we have a virtual version of the Workbook our volunteers receive with their Bee Blocks.
2015 Workbook Gallery of Wood Nesting Bees from Workbook
Here you can also access the page from the workbook that has the bee block diagram for recording your nesting observations.
The Bees' Needs 
You gave me a new bee block in 2015. Do you still want me to report on activity in my old bee block?
Thanks!