"grade three" is a correct and usable phrase in written English.
It is usually used to refer to the third year of an educational level or program. For example, "My daughter is in grade three this year."
He flunked the seventh grade three times.
Lab tests revealed I had grade three breast cancer.
When Broad left the field, an ultrasound confirmed that he had suffered a grade three tear.
Abdella, for instance, left school after grade three and can barely read or write.
True, the pitch was docile but Finn was in grade three among the English seamers.
In the worst of the gravel – "grade three", we called it – it was quicker to walk.
That one has won four at Auteuil since then, including a Listed and a Grade Three.
Most of those studied were African-American women who volunteered at six Baltimore public schools, in kindergarten through grade three.
"He's got a grade three a/c joint injury and is currently seeing a specialist in Manchester.
Now with Jonjo O'Neill after 16 months off, he carries top weight in the Grade Three handicap chase at Cheltenham.
Had a hard race that day and subsequent record is just 1/14, landing a small-field Grade Three at Cork.
