Wiskundehulp

Wiskundehulp is a free maths help site for secondary-school students in the Netherlands (vmbo, havo, vwo). Every calculator shows the full working, not just the answer: percentages, fractions, the quadratic (ABC) formula, Pythagoras, sine/cosine/tangent, derivatives, normal distribution, powers and roots and more. Each topic has examples per school level, common mistakes, and a practice module with adaptive questions and a timed test mode. Interactive simulations (parabola, unit circle, exponential growth, tangent line) let students see what a formula does. Exam pages list what the 2027 central exam syllabus asks per level, with links to the right tools. No account, no paywall, works on phone and desktop, light and dark mode.