Louis Leithold
... that Louis Leithold, an AP calculus "legend", came out of retirement at age 72 to "relentlessly" drill high school students in calculus?
... that <b id="mwDSw"><a href="./Louis_Leithold" id="mwDS0" rel="mw:WikiLink" title="Louis Leithold">Louis Leithold</a></b>, an <a class="mw-redirect" href="./Advanced_Placement_Calculus" id="mwDS4" rel="mw:WikiLink" title="Advanced Placement Calculus">AP calculus</a> "legend", came out of retirement at age 72 to "relentlessly" drill high school students in <a href="./Calculus" id="mwDS8" rel="mw:WikiLink" title="Calculus">calculus</a>?