E-assessment is a powerful tool for supporting the learning of mathematics. Early trials began back in 1991 on a local network. Over the past 25 years technical advances have widened and improved its delivery. For the past 10 years MapleTA has been adopted and a huge range of question banks have been developed. Some recent topics include dimensional analysis, fractals, linear programming, Fourier series, oscillatory motion, series solution of ODEs, Laplace transforms and basic solution methods for PDEs. A key element in providing students with feedback on their progress is the “How Did I Do?” option, which allows them to check their answers as they progress through extended problems. The same question is equally relevant when evaluating the effectiveness of e-assessment for many thousands of students over several decades.