There are several websites that offer free images for bloggers to use in their training materials. Some options include:
Pexels: Pexels offers a wide range of high-quality photos that you can use for free, even for commercial purposes.
Unsplash: Unsplash is a popular source of high-resolution, royalty-free images. You can search for specific keywords or browse through collections to find the perfect image for your needs.
Pixabay: Pixabay is a large database of free images and videos that you can use for your blog. You can search for specific keywords or browse through categories to find the right image.
StockSnap: StockSnap offers a large collection of high-quality, royalty-free images that you can use for your blog. You can search for specific keywords or browse through categories to find the right image.
Canva: Canva is a design tool that offers a wide range of free, high-quality images that you can use for your blog. You can search for specific keywords or browse through categories to find the right image.
It's important to make sure that you properly attribute any images that you use from these websites, as some may require a link back to the original source. You should also check the specific terms of use for each website to make sure that you are using the images in accordance with their policies.