The Mighty 100s
The Mighty 100s are a rhythmic training exercise that students in all of the Lower Merion curricular ensembles (Band, Choir, and Orchestra) are assigned to complete. Students in Music Major (H) and AP Music Theory are also expected to complete Mighty 100s as part of their class.

Mighty 100s are mostly self-directed. While all classes will devote occasional class time to Mighty 100s practice and testing, students are expected to do most of their Mighty 100s practice on their own outside of class. Music teachers are nearly always available to help any student who has questions or needs help.
What is due?
Most students complete the Mighty 100s over the course of four years as members of the music department. Refer to the chart below to determine which sheet is due for you.

How do you complete Mighty 100s?
  1. Pick up the appropriate sheet from a music teacher. You can also download the entire packet below and print out your own copy.
  2. Bring the sheet to a music teacher. They will go over any new things you'll encounter on that sheet.
  3. Write in the counts for the entire sheet.
  4. Practice conducting/tapping* while counting the rhythms out loud. Once you can move from measure to measure and line to line fluidly without stopping, go on.
  5. See a music teacher to test on that sheet. If you are successful, you will be checked off for that sheet. If not, you will be asked to practice more and test again.

*conducting/tapping requirements vary from teacher to teacher. Make sure you know the requirements of the teacher you plan on testing with.
Helpful Tips
  • ​Mighty 100s sheets must be completed in the proper sequence. If you need to make up earlier sheets, make sure you plan ahead to do so. You will not be allowed to test on a sheet until you have completed all previous sheets.
  • Always work off of a printed sheet and write the counts in by hand. It helps!
  • If you're stuck on something or feel like you'll never get finished, see a music teacher. We spent years in college training for exactly this scenario. We can get you through the Mighty 100s, no matter how difficult they seem.
  • Practice conducting patterns separate from the written rhythms until you are comfortable with them.


Every quarter you will receive a 100-point grade for Mighty 100s. If you have completed all of your assigned Mighty 100s sheets for that quarter, you will get full credit (100 points). For every sheet you do not have complete 10 points will be deducted from your score. For example, if you have one sheet assigned and do not complete it, you will receive a score of 90. If you have one sheet assigned and do not complete it, but you also did not complete your assigned sheet from the previous quarter, you will receive a score of 80.
The scoring system for Mighty 100s is meant to minimize the penalty for not completing an assigned sheet as long as you are mostly up to date. In most cases a 90 on Mighty 100s will not have a significant negative effect on your quarter grade, but if you make a habit of neglecting your Mighty 100s, a 60 on Mighty 100s (the grade you get if you neglect them for a year) will absolutely result in a significantly reduced quarter grade. The moral of the story: Stay current, even if you miss the end-of-quarter deadline occasionally. 



You can find Mighty 100s packets for download on your music teacher's Blackboard. Printed copies are available in the third drawer down in the file cabinets in both the Vocal and Instrumental Music rooms.

You can also download the Mighty 100s packet here!
If you've forgotten what sheet you're on in the Mighty 100s you can either ask any music teacher, or you can click the button below. It will take you to a Google Sheet where you can search for your student number (Ctrl-F or ⌘F) to find your records. If you feel like there is an error in your record, please contact a music teacher to resolve it.
Mighty 100s
Complete Packet Download
Mighty 100s
Public Record View
How to Read Rhythms
Visit for more practice and information.
This video is an introduction to music notation and how to count out rhythms. It contains information on the basics:
  • basic note values (whole, half, quarter, eighth, sixteenth)
  • basic rest values (whole, half, quarter, eighth, sixteenth)
  • dotted notes (augmentation dots)
  • ties
Conducting Patterns
Not all teachers require conducting, but it's a good skill to have that doesn't take much time to learn.
This video introduces all of the conducting patterns you'll need for conducting in Mighty 100s. That includes:
  • Two pattern: 2/4, 2/2 (cut time), 6/8, 5/8
  • Three pattern: 3/4, 3/2, 9/8, 7/8
  • Four pattern: 4/4 (common time), 4/2, 12/8, 9/8, 10/8, 11/8
  • One pattern: 1/4, 3/8, 3/4 (waltz tempo)
  • Five pattern: 5/4