whetstone

"The school science project involved identifying different rocks based on the minerals they contained, like quartz and feldspar. "

"Over the years, their industry and business sense made them wealthy."

"My uncle is a computer for our family; he's always calculating budgets and costs. "

"Coffee is a stimulant that helps many students stay awake during late-night study sessions. "

"He listened carefully to his mother's concerns, feeling sorrowful about her disappointment. "

"The school's new uniform policy is the standard for all students. "

"The new math curriculum uses standardized tests as a benchmark for student progress. "

"to sharpen a pencil or a knife or a musical note"

"The architect's graphics for the new school building were impressive. "

"It will take several years to evaluate the material gathered in the survey."

"We challenged the boys next door to a game of football."

"the performance of an undertaking or a duty"