Built on Mateer, Coppock & Nietfeld. Every chapter is a single self-contained page: short reading chunks, live models you can push on, retrieval checkpoints spaced through the material, and a quiz at the end. Nothing to install, works offline, progress saved in your browser.
Answer each checkpoint before scrolling on, and answer from memory. Looking back up at the text first feels more accurate and teaches you much less — the effort of retrieval is the part that builds the memory.
Come back to a finished chapter two or three days later rather than re-reading it. Spaced retrieval beats massed review by roughly g = 0.74, which is the single largest effect in the learning-science literature and the reason this guide is built the way it is.