CMISAll applicants must have passed their required birth date by August. This policy applies to all grade levels, without exception. The age/grade level standard is as follows:
2024 - 2025 Age/Grade Standard
| Preschool (2024-2025) | |||
| Preschool 3 | Age 3 | Born between August 2020 | and August 2021 |
| Preschool 4 | Age 4 |
Born between August 2019 |
and August 2020 |
| Elementary School (2024-2025) | |||
| Kindergarten | Age 5 |
Born between August 2018 |
and August 2019 |
| Grade 1 | Age 6 |
Born between August 2017 |
and August 2018 |
| Grade 2 | Age 7 |
Born between August 2016 |
and August 2017 |
| Grade 3 | Age 8 | Born between August 2015 | and August 2016 |
| Grade 4 | Age 9 | Born between August 2014 | and August 2015 |
| Grade 5 | Age 10 | Born between August 2013 | and August 2014 |
| Middle School (2024-2025) | |||
| Grade 6 | Age 11 | Born between August 2012 | and August 2013 |
| Grade 7 | Age 12 | Born between August 2011 | and August 2012 |
| Grade 8 | Age 13 | Born between August 2010 | and August 2011 |
| High School (2024-2025) | |||
| Grade 9 | Age 14 | Born between August 2009 | and August 2010 |
| Grade 10 | Age 15 | Born between August 2008 | and August 2009 |
| Grade 11 | Age 16 | Born between August 2007 | and August 2008 |
| Grade 12 | Age 17 | Born between August 2006 | and August 2007 |
2025 - 2026 Age/Grade Standard
| Preschool (2025-2026) | |||
| Preschool 3 | Age 3 | Born between August 2021 | and August 2022 |
| Preschool 4 | Age 4 |
Born between August 2020 |
and August 2021 |
| Elementary School (2025-2026) | |||
| Kindergarten | Age 5 |
Born between August 2019 |
and August 2020 |
| Grade 1 | Age 6 |
Born between August 2018 |
and August 2019 |
| Grade 2 | Age 7 |
Born between August 2017 |
and August 2018 |
| Grade 3 | Age 8 | Born between August 2016 | and August 2017 |
| Grade 4 | Age 9 | Born between August 2015 | and August 2016 |
| Grade 5 | Age 10 | Born between August 2014 | and August 2015 |
| Middle School (2025-2026) | |||
| Grade 6 | Age 11 | Born between August 2013 | and August 2014 |
| Grade 7 | Age 12 | Born between August 2012 | and August 2013 |
| Grade 8 | Age 13 | Born between August 2011 | and August 2012 |
| High School (2025-2026) | |||
| Grade 9 | Age 14 | Born between August 2010 | and August 2011 |
| Grade 10 | Age 15 | Born between August 2009 | and August 2010 |
| Grade 11 | Age 16 | Born between August 2008 | and August 2009 |
| Grade 12 | Age 17 | Born between August 2007 | and August 2008 |
2023 - 2024 Age/Grade Standard
| Preschool (2023-2024) | |||
| Preschool 3 | Age 3 | Born between August 2019 | and August 2020 |
| Preschool 4 | Age 4 |
Born between August 2018 |
and August 2019 |
| Elementary School (2023-2024) | |||
| Kindergarten | Age 5 |
Born between August 2017 |
and August 2018 |
| Grade 1 | Age 6 |
Born between August 2016 |
and August 2017 |
| Grade 2 | Age 7 |
Born between August 2015 |
and August 2016 |
| Grade 3 | Age 8 | Born between August 2014 | and August 2015 |
| Grade 4 | Age 9 | Born between August 2013 | and August 2014 |
| Grade 5 | Age 10 | Born between August 2012 | and August 2013 |
| Middle School (2023-2024) | |||
| Grade 6 | Age 11 | Born between August 2011 | and August 2012 |
| Grade 7 | Age 12 | Born between August 2010 | and August 2011 |
| Grade 8 | Age 13 | Born between August 2009 | and August 2010 |
| High School (2023-2024) | |||
| Grade 9 | Age 14 | Born between August 2008 | and August 2009 |
| Grade 10 | Age 15 | Born between August 2007 | and August 2008 |
| Grade 11 | Age 16 | Born between August 2006 | and August 2007 |
| Grade 12 | Age 17 | Born between August 2005 | and August 2006 |