Most of what I know about carpentry, which is almost nothing, I learned in Shop.You should know that I took Shop during the Eisenhower administration, when boys took Shop and girls took Home Economics---a code name for "cooking." Schools are not allowed to separate boys and girls like that anymore. They're also not allowed to put students' heads in vises and tighten them, which is what our Shop teacher, Mr. Schmidt, did to Ronnie Miller in the fifth grade when Ronnie used a chisel when he should have used a screwdriver. (Mr. Schmidt had strong feelings about how to use tools properly.) I guess he shouldn't have put Ronnie's head in the vise, but it (Ronnie's head) was no great prize to begin with, and you can bet Ronnie never confused chisels and screwdrivers in later life---assuming he made it to later life. The main purpose of this passage is to _____.