You can use a smartphone or tablet app to scan the QR codes and explore more! Cover up neighboring QR codes to make sure you’re scanning the right one. You can find a list of URLs on the Resources page. If the QR code doesn’t work, try searching the internet with the Keyword Prompts to find other helpful sources. Space Race
What are source notes? In this book, you’ll find small numbers at the end of some paragraphs. These numbers indicate that you can find source notes for that section in the back of the book. Source notes tell readers where the writer got their information. This might be a news article, a book, or another kind of media. Source notes are a way to know that what you are reading is true information that other people have verified. They can also lead you to more places where you can explore a topic that you’re curious about!