I am trying to work through exercise 20a , however I've encountered a problem with the Polygon To Raster tool in the ModelBuilder. I am using ArcMap10.8. The exercise has you "Add Field" - "PERC_UNDER5" to Study Area Block Groups which creates an intermediate dataset in Study Area Block Groups 2. You then "Calculate Field" PERC_UNDER5 from Study Area Block Groups 2 which results in intermediate dataset Study Area Block Groups 3. You then use Study Area Block Groups 3 with the Polygon to Raster to to create an Output Raster Dataset called "children.
The "Add Field" and "Calculate Field" tools appear to be working correctly as the Attribute Table for Study Area Block Groups is amended to include the PERC_UNDER5 field populated with appropriate values.
However when you add the "children" dataset to the display the values read from 3.40282e+38 to -3.40282e+38.
I saw a feed on Reddit where another user was experiencing the exact same problem.
I've followed the steps in the book to the letter.