Below is a list of the departments at our school. Please check back soon for more information!

The Canadian and World Studies Department is proud to offer a variety of courses dealing with everything from our compulsory courses (Geography, History and Civics) to our Senior level options (Physical Geography, World Issues, Gr. 11 and 12 Law, Ancient Civilizations, West and the World, American History, and Canadian Politics). Students will develop not only their understanding of these eras and concepts, but critical and creative thinking skills as well as problem solving strategies. We aim to develop learners who will excel beyond the classroom, recognizing that our world today needs a whole new and diverse skill-set to adapt to the constant change.

Cooperative Education (Co-op) is a unique learning opportunity that extends classroom learning into business, industry and the community. The opportunity to experience the workplace helps students explore career options and gather information they need to make informed decisions about their post secondary destinations. Students increase their self-knowledge while developing valuable transferable skills and gain an understanding of the importance of attitude, teamwork and personal management skills in the workplace. Those students planning for the workplace destination, co-op facilitates the transition from school into work.

Click here for our Co-op page

For Library Resources, visit our Library Page

Search our School Library

Math Pathways Chart

Math Chart Colour

Math Help

Available in Room 302 on Wednesdays from 2:45 pm to 3:45 pm.

Grade 9 EQAO Math

All Grade 9 Teachers will be discussing and preparing students throughout the semester for this Assessment. Students with Mathematics Semester 1 (in MFM1P, MPM1D, and MPM1DA) will take place on January 14th and January 15th (January 16th in case of Snow Day on January 14th or 15th). Students with Mathematics Semester 2 (in MFM1P, MPM1D, and MPM1DA) will take place on June 10th and June 11th. For more information, please contact your child’s classroom teacher or visit

Contest Dates for 2019/2020 school year are:

Canadian Intermediate (Grades 9, 10)/Senior (Grades 11, 12) Mathematics Contests – Wednesday, November 20th, 2019; Periods 1 and 2 in the Library
Pascal (Grade 9)/Cayley (Grade 10)/Fermat (Grade 11) Mathematics Contests – Tuesday, February 25th, 2019; Period 1 in the Library
Euclid (Grade 12) Mathematics Contest – Tuesday, April 7th, 2019; Periods 1 and 2 in the Library

Registrations for Mathematics Contests can be done through school Cash Online.

Any other contests that students wish to get involved in, are asked to contact Mr. Sluski in Workroom 34. For more on the contests, please go to the following website:

Welcome to the Holy Trinity Science department!

Earth day video produced by Mrs. Rutkowski’s classes and the environmental club

Holy Trinity is taking part in the Halton BioBlitz Led by Dr. Pereyra

A BioBlitz, is an intense period of biological surveying in an attempt to record all the living species within a designated area. Groups of scientists, naturalists and volunteers conduct an intensive field study over a continuous time period

Department members include:

  • Mr. Balech
  • Mr. Berndt
  • Mr. Cushing
  • Mr. D’Abreo
  • Mrs. Edgar
  • Mr. McConville
  • Mrs. McIntyre
  • Mr. Orlanski
  • Dr. Pereyra
  • Ms. Raper
  • Mrs. Richards
  • Mrs. Rutkowski

Special Education Homework Help for Students with IEPs (Individual Education Plan)

Room 103
Daily – 7:55 am – 8:25 am

Please contact your SERT if you have any questions or require further information.

Special Education Department Staff

  • Mrs. P. Yurincich – Special Education Department Head – 905 257 3534 x 2017
  • Mr. Jermaine Fletcher – SERT
  • Mr. William Hoch – SERT
  • Mr. J. Zicarelli – SERT
  • Mrs. Emmy Kostya – Life Skills SERT
  • Mrs. Nicole (Dooley) Mayes – Life Skills SERT

Welcome to HT Student Services! Our staff work with your teen to provide academic and career counselling. Students are constantly transitioning during their secondary school experience: from elementary to secondary, from semester to semester, from intermediate to senior level, from secondary to post-secondary. These transitions require planning, research and the expertise of the Guidance Counselor. Our job is to help in whatever way possible, and that help can come in many forms. We also help students with non-academic concerns and work closely with our Social Worker to connect students to community programs that can help.
If you have any questions or concerns about your child, please contact their Guidance Counselor. The Department posts important information regularly; this includes information about pathways, course selection opportunities, specialty programs, mental health initiatives, volunteers and scholarship opportunities and much more!
Guidance Counselors see students by alpha via surname:
Ms. Latimer: A-D
Mrs. Castiglione: E-K
Mr. MacPherson: L-Q
Ms. Waechter: R-Z & International Students


  • Ms. Latimer – Department Head of Student Services (ext. 2011)
  • Mr. MacPherson (ext. 2012)
  • Ms. Waechter (ext. 2013)
  • Mrs. Castiglione (ext. 2014)
Specialty Programming Staff:
Mr. Anand Pillai (Student Success)
Ms. Duguay (Social Worker)
Ms. Vasiliaskas (CYC Worker)
Mr. Christie (Co-op Education)


Holy Trinity now has a SHSM you can now enrol in no matter which pathway you are in. Students interested in Transportation, Small Engines, Tech. Design or Robotics should see their guidance counselor.


We recommend that students take Technology courses at Holy Trinity.

”More than 12 per cent of Canadians between the ages of 15 and 24 are unemployed and more than a quarter are underemployed, meaning they have degrees but end up in jobs that don’t require them”.
– CBC news March 12, 2017

Technology Subject Areas at Holy Trinity

  • Exploring Technologies
  • Construction Technology
  • Technological Design
  • Communication Technology
  • Hospitality and Tourism
  • Computer Programming
  • Transportation Technology
  • Small Engines
  • Hairstyling and Esthetics
  • Wood Working
De Franco, RobDepartments