The document discusses online calculators that can help math-averse students with tasks like calculating body mass index and bone strength. It provides code for a JavaScript calculator for BMI and describes how another calculator can be used to determine the diameter of leg bones needed to support a given animal's weight without breaking. The author notes that using such calculators on exams helped students perform better on math problems compared to the previous year and that they requested the calculators for other problems as well. However, the calculators are tricky to write and online exams need improvements like multiple question variants and better help systems, which require significant time investments.