You can use the heidoc.net ISO downloader tool to get the ISO file directly from Microsoft:
Microsoft Windows and Office ISO Download Tool
BTW, the "Education" version of Windows 10 that you get from the Microsoft website by spoofing the browser type does contain all the version of Windows 10, contents of Win10_Edu_1803_English_x64.iso:
Code:
I:\sources>dism /get-wiminfo /wimfile:install.wim
Deployment Image Servicing and Management tool
Version: 10.0.17134.1
Details for image : install.wim
Index : 1
Name : Windows 10 Home
Description : Windows 10 Home
Size : 15,424,128,545 bytes
Index : 2
Name : Windows 10 Home N
Description : Windows 10 Home N
Size : 14,353,504,148 bytes
Index : 3
Name : Windows 10 Home Single Language
Description : Windows 10 Home Single Language
Size : 15,424,175,971 bytes
Index : 4
Name : Windows 10 Education
Description : Windows 10 Education
Size : 15,644,169,970 bytes
Index : 5
Name : Windows 10 Education N
Description : Windows 10 Education N
Size : 14,571,793,777 bytes
Index : 6
Name : Windows 10 Pro
Description : Windows 10 Pro
Size : 15,644,048,998 bytes
Index : 7
Name : Windows 10 Pro N
Description : Windows 10 Pro N
Size : 14,571,634,425 bytes
Index : 8
Name : Windows 10 Pro Education
Description : Windows 10 Pro Education
Size : 15,644,097,358 bytes
Index : 9
Name : Windows 10 Pro Education N
Description : Windows 10 Pro Education N
Size : 14,571,720,265 bytes
Index : 10
Name : Windows 10 Pro for Workstations
Description : Windows 10 Pro for Workstations
Size : 15,644,133,430 bytes
Index : 11
Name : Windows 10 Pro N for Workstations
Description : Windows 10 Pro N for Workstations
Size : 14,571,756,787 bytes
The operation completed successfully.
I:\sources>