Weekly homework quizzes as formative assessment for Engineering students are a fair and effective strategy to increase learning?

International audienceA strategy to apply online weekly homework quizzes as formative assessment for Engineering students was designed and tested in order to study if it increases student's learning. The strategy was to make optional weekly online quizzes not randomly generated that students may retry over and over again until to reach the correct answer, they contribute to 10% of grade but only if students get 45% or more in traditional assessment.The quizzes were applied to two different mathematics courses (Single and Multivariable Calculus) of two different Engineering degrees, each one to around 100 students and during a semester. Student's adherence was very high, nearly all students refer quizzes as fair and useful to learning. Students' grades were compared with several other years.Keywords: The role of digital and other resources in university mathematics education, Assessment practices in university mathematics education, Teaching and learning of analysis and calculus