Prepare handouts for class which have a picture of a blank clock. Have students fill in the correct Roman numerals in order from one to twelve and in the correct place that mimics a working clock. Once complete, tell the students different times, such as "1:30" or "10:10" and have them draw the correct time on the clock. Make sure they use a pencil so times can be erased after each task.
Be creative when making a secret code lesson plan. Make sure students have photocopies of Roman numerals and what numbers they represent or have students memorize the numerals. Pass out a sheet of paper written in Roman numerals, matching the numerals to letters of the alphabet. Give students a 10-minute time limit for decoding. Compare results as a group when time is up.
Have students fill out a contact information page and instead of using standard numbers, students should convert all numbers into Roman numerals. Make sure they convert street addresses, ZIP codes and telephone numbers. When complete, review as a class, making any needed changes. Pass out another page and have students fill out their birth date and year in Roman numerals. After review, hand out pages and have students read the Roman numerals out loud as the numbers they represent to test comprehension.
If students have access to a computer at school or at home, suggest websites which are available online for Roman numeral practice. Many websites, such as Quia, offer matching and flashcard games for learning Roman numerals. Practice conversion on websites like Soft Schools. Consider sending a list home and having parents and students practice these together. Have parents sign off when a lesson has been completed together.