Visual learners thrive when looking at well-designed maps and charts, and they also remember material better when there is a visual image associated with it. If you're studying history, try drawing a chart of people's relationships. If you can place historical figures on a map and write their roles in history under their names, you will be able to visualize the material you've learned when it's time to take a test.
A visual learner does best when something abstract becomes concrete. While this cannot be done with all concepts, try to find a way to see the thing you're studying come to life. If, for example, you're learning about ecosystems, consider going to a park and mapping out the interactions you see within that microcosm of the ecosystem. Sometimes the very process of attempting to make something concrete can be a valuable study tool for visual learners.
Posters can be great tools for helping students remember information for tests, but the information middle schoolers are learning in school can be too complex to be summed up on a simple poster. A simple alternative poster can help visual learners, though. Write down the important facts you are learning on a large piece of paper, and tape it to the wall. The visual nature of the poster will grab your attention and make it easier for your brain to encode the information into your memory.
The brains of visual learners quickly notice color alterations. The simple act of highlighting information can, therefore, be a vital study skill. Try grouping different types of information according to color. For example, if you are studying the Civil War, you can assign a different color to people on different sides of the War. Write down people's names and relevant facts in these colors.