Helping Engineers Learn Mathematics Workbooks (HELM) Free college level workbooks. CC-Licensed.
HELM (Helping Engineers Learn Mathematics) Workbooks have been developed to assist engineering students learn the mathematics and statistics that they will need at university.

There are 50 workbooks in total. They cover the basic engineering mathematics and statistics teaching for first and second year students in a typical UK undergraduate engineering course.
A significant effort has been made to ensure that the Workbooks are student focused and contain examples of engineering applications of the mathematics and statistics.
Workbooks 1 - 34 contain mathematics material for engineering undergraduates.
Workbooks 35 - 46 contain probability and statistics material for engineering undergraduates.
Workbook 47 contains a miscellany of Mathematics and Physics related problems, including dimensional analysis.
Workbook 48 contains 20 in depth Engineering Case Studies.
Workbook 49 is a Student's Guide.
Workbook 50 is a Tutor's Guide.
Interactive HELM workbooks
Some of the HELM workbooks are also available as interactive content, where you can solve the practice questions online and receive automatic feedback on your answers.
Click the button below to access the interactive HELM workbooks on Learn (enrollment key: HELM2020).
https://learn.lboro.ac.uk/enrol/index.php?id=11093
There is also a case study on the Stack website. ( https://stack-assessment.org/CaseStudies/2021/HELM/ )
Hey, Moodle Quizzes. I am an early Moodle fan.
Execution
So far, about half of the workbooks have been made into Moodle quizzes. Most of the quizzes corresponding to workbooks 119 and 3539 were created during the summer of 2020. These include all the exposition and worked examples as description boxes, and STACK versions of most of the tasks and exercises in each workbook. The materials covered by these quizzes include:
Basic algebra and elementary functions
Linear algebra
Complex numbers
Calculus and differential equations
Probability
more at the link.
THE MAIN COURSE(S)
https://nucinkis-lab.cc.ic.ac.uk/HELM/helm_workbooks.html
