"Applied mathematics for environmental engineers" - Interactive articles (in English).
"Algebra och geometri" - Interactive articles on basic algebra and geometry (in Swedish).
"Commutative Algebra and Algebraic Geometry" - More or less a book introducing modern algebraic geometry from a classical and example driven point of view. The text also aims to introduce the minimal amount of commutative algebra needed. If you are interested in using parts of the text for teaching purposes I'd be happy to share tex-files in case you want to make adjustments.
"Linjär algebra II" - Lecture notes (in Swedish) from a course given at Uppsala University (a second course in linear algebra).
"Linjär algebra II" - YouTube playlist with lectures (in Swedish) about linear algebra.
"Algebra och Kombinatorik" - YouTube playlist with lectures (in Swedish) from a first course in algebra and combinatorics.
"Matematik D" - Lecture notes (in Swedish) from a course given at Stockholm University (high school level algebra, trigonometry, derivatives etc.)
"Att skriva en matematisk text" - a short note (in Swedish) about how to write mathematics.