Is “Schoolbook” a Scrabble word?
Yes
SCHOOLBOOK
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Schoolbook
noun
1.A textbook, a book used, or prepared for use, in school.