There are a variety of methods to help students recall information. I will list a few for you here that I know are popular among educators.
1- Use of mnemonics or associating one thing with something else. For example, telling students that Italy is shaped like a boot, can help them to locate this country on a map.
2- Use of multi-sensory instruction. Using oral, hands on, and visual presentation of a lesson can help a child to remember the concepts as they are having a number of ways to engage with the information and process it meaningfully.
3- Make up a funny song or poem. Remember how we remember the ABC's when we are young? Well, making up of a song or poem can help to recall other information as well.
4- Make a game with information that is used. Concentration, jeopardy, make your own jigsaw puzzles, etc. all can be useful tools for recall. (Many excellent suggestions also can be found on this website, Education.com) Also, students can create their own game with the information they need to learn.
5- Let them take turns being the teacher. We all process information differently when we change roles, such as switching from student to teacher. Have the students create tests for their subjects. And reward their efforts by actually using some of their questions on your real tests.