One of our laptops, for example, is a super slim ultrabook from a few years back.
Not only is Optifine great for all computers running Minecraft (Mojang, as much as we love Minecraft, has been a little sloppy with their GPU and graphic optimization code), it can take a computer that barely renders Minecraft and provide a playable experience. While we wouldn’t devote an entire lesson to a single gameplay-tweaking mod, we can’t stress enough how great Optifine is and why you should install it and seriously configure it.