| School | Address | City | Province | Postal Code |
| M.M. Robinson High School | 2425 Upper Middle Road | Burlington | ON | L7P 3N9 |
| MacKenzie High School | 87 Brockhouse Way | Deep River | ON | K0J 1P0 |
| MacLachlan College | 337 Trafalgar Road | Oakville | ON | L6V 3H3 |
| Magee Secondary School | 6360 Maple Street | Vancouver | BC | V6M 4M2 |
| Malaspina International Collegiate | 900 5th Street | Nanaimo | BC | V9R 5S5 |
| Maple Ridge Secondary School | 21911 122nd Avenue | Maple Ridge | BC | V3X 3X2 |
| Marc Garneau Collegiate Institute | 135 Overlea Blvd. | Don Mills | ON | M3C 1B3 |
| Marion M Graham Collegiate | 602 Lenore Drive | Saskatoon | SK | S7K 6A6 |
| Markham District High School | 89 Church Street | Markham | ON | L3P 2M3 |
| Markville Secondary School | 1000 Carlton Road | Markham | ON | L3P 7P5 |
| Marshall McLuhan Catholic Secondary School | 1107 Avenue Road | Toronto | ON | M5N 3B1 |
| Martingrove Collegiate Institute | 50 Winterton Drive | Toronto | ON | M9B 3G7 |
| Mary Ward Catholic Secondary School | 3200 Kennedy Road | Scarborough | ON | M1V 3S8 |
| Marymount Academy | 165 D’Youville Street | Sudbury | ON | P3C 5E7 |
| Matthew McNair Senior Sec. | 9500 Number 4 Road | Richmond | BC | V7A 2Y9 |
| Maxwell International Bahai School | Bag 1000 | Shawnigan Lake | BC | V0R 2W0 |
| McCoy High School | 202 - 8th Street N.E. | Medicine Hat | AB | T1A 5R6 |
| Meadowridge School | 12224 - 240 St. | Maple Ridge | BC | V4R 1N1 |
| Meadowvale Secondary School | 6700 Edenwood Drive | Mississauga | ON | L5N 3B2 |
| Mealy Mountain Collegiate | Box 492 Station C | Goose Bay | NF | A0P 1C0 |
| Medway High School | 14405 Medway Road | Arva | ON | N0M 1C0 |
| Melfort Comprehensive Collegiate | Box 99 | Melfort | SK | S0E 1A0 |
| Melville Comprehensive School | 10th Avenue East | Melville | SK | S0A 2P0 |
| Memorial Composite High School | Box 760 | Stoney Plain | AB | T0E 2G0 |
| Mennonite Brethren Collegiate Institute | 180 Riverton Avenue | Winnipeg | MB | R2L 2E8 |
| Mennonite Educational Inst | Box 2240 4081 Clearbrook Rd. | Clearbrook | BC | V2T 3X8 |
| Mentor College | 40 Forest Avenue | Mississauga | ON | L5G 1L1 |
| Merivale High School | 1755 Merivale Road | Nepean | ON | K2G 1E2 |
| Merritt Secondary School | 1561 Chapman Street | Merritt | BC | V1K 1B8 |
| Michael A Riffel High School | 5757 Rochdale Blvd. | Regina | SK | S4X 3P5 |
| Middlefield Collegiate Institute | 525 Highglen Avenue | Markham | ON | L3S 3L5 |
| Middleton Regional High School | 18 Gates Avenue | Middleton | NS | B0S 1P0 |
| Miller Comprehensive High School | 1027 College Avenue | Regina | SK | S4P 1A6 |
| Milliken Mills High School | 7522 Kennedy Road | Unionville | ON | L3R 9S5 |
| Millwood High School | 141 Millwood Drive | Lower Sackville | NS | B4C 2S9 |
| Miramichi Valley High School | 345 McKenna Avenue | Newcastle | NB | E1V 3S9 |
| Miss Edgar's and Miss Cramp's School | 525 Mount Pleasant Avenue | Montreal | QC | H3Y 3H6 |
| Mission Secondary School | 32939 Seventh Avenue | Mission | BC | V2V 2C5 |
| Monsignor Doyle Catholic Secondary School | 185 Myers Road | Cambridge | ON | N1R 7H2 |
| Monsignor Percy Johnson Catholic High School | 2170 Kipling Avenue | Rexdale | ON | M9W 4K9 |
| Morden Collegiate | 345 5th Atreet | Morden | MB | R6M 1Z1 |
| Morris School | 324 Toronto Avenue East | Morris | MB | R0G 1K0 |
| Moscrop Secondary School | 4433 Moscrop Street | Burnaby | BC | V5G 2G3 |
| Mount Baker Secondary School | 1410 Baker Street | Cranbrook | BC | V1C 1B2 |
| Mount Boucherie Secondary | 2751 Cameron Road | Kelowna | BC | V1Z 2T6 |
| Mount Douglas Senior High School | 397O Gordon Head Road | Victoria | BC | V8N 3X3 |
| Mount Pearl Senior High School | 50 Ruth Avenue | Mount Pearl | NF | A1N 2H5 |
| Murdoch Mackay Collegiate Institute | 260 Redonda Street | Winnipeg | MB | R2C 1L6 |
| Musgrave Central High School | P O Box 33 | Musgravetown | NF | A0C 1Z0 |