If your child gets stressed out while using XtraMath.org, this is the solution you are looking for. This script will remove the teacher image and the answer that pops up if the child doesn't answer fast enough.
// ==UserScript==
// @name Remove the teacher and the answer on XtraMath.org
// @namespace https://xtramath.org
// @version 0.1
// @description If your child gets stressed out while using XtraMath.org, this is the solution you are looking for. This script will remove the teacher image and the answer that pops up if the child doesn't answer fast enough.
// @author Kevin Ruettiger
// @match https://xtramath.org*
// @grant none
// ==/UserScript==
/* jshint -W097 */
'use strict';
function addGlobalStyle(css) {
var head, style;
head = document.getElementsByTagName('head')[0];
if (!head) { return; }
style = document.createElement('style');
style.type = 'text/css';
style.innerHTML = css;
head.appendChild(style);
}
addGlobalStyle('.teacherImage { display: none !important; }');
addGlobalStyle('.remaining_answer { display: none !important; }');