Using multiple assessment methods and systems provides a comprehensive assessment. Assessment using online systems is a convenient way to contribute to student progress and assess their performance. There are several methods for taking online assessments, including quizzes and online exams. A template for online assessments was created using a set of multiple-choice questions, used and refined over several years. An overview of system usage is provided here. A hardware infrastructure topology was created to be used for assessment only in a local area network and software was created to manage this infrastructure locally for generating an assessment and globally for querying the assessment results and setting the associated scores. The template has been used to add content for a range of chemistry-related subjects. A MySQLi server was used to store the data and a series of PHP programs were created to manage the assessment. The online evaluation system was intended to be used several times to evaluate the degree of assimilation of a certain course at the end of it. At each assessment, the number of correct answers and the time spent on the assessment were recorded. From 2006 to 2024, the system was used for the evaluation of approximately 3300 students in a number of 8 disciplines. A known theoretical distribution model (WakeBy) was identified as the best fit with the sample containing all evaluation times from all students and all disciplines (6440 values). The comparison between the evaluation times at the first and last evaluation indicates a statistically significant shortening of the evaluation time (p < 6 ·10-21). The observed distribution of the number of repeated assessments of a student (the observed distribution excludes 0) has a Lorentzian shape (r2adj > 0.9999), but with no fit to any of the 65 alternatives of known distribution tested. The use of the system showed that the possibility of taking the test several times during the evaluation period was a clear advantage in favor of knowledge assimilation. The WakeBy distribution models well the evaluation times of the first evaluations but not the evaluation times of the last evaluations. One possible inference is due to a tendency to use the system to make quick blind assessments or skim the questions and answers. The consequence is that the teacher must always look at the composition of the series of repeated assessments before determining the final results. The implemented system has worked well for almost two decades and a slight modification of it has served very well in remote assessment during the Covid-19 period. The emergence of mobile applications requires the creation of a system adapted to the new virtual reality. The patience of the students as they used the perfected system along the way was greatly appreciated.

Keywords: Online evaluation system, multiple choice questions, chemistry topics, undergraduate students.