Hanz Learning Lab
Free learning · Mr. Casimir's science classroom

Learning that plays like a game.

A hand-picked set of interactive games used in real Philadelphia classrooms. Quiz battles, math puzzles and animated lessons for students, families and teachers. Every link opens the official site.

👨🏾‍🏫 Meet Mr. Casimir 🏫 Join my Google Classroom ✉️ Message Mr. Casimir 📘 Textbooks ▶️ Videos 🎮 Games & practice 📅 Calendar 🔔 Bell schedule 👨‍👩‍👧 Parent sign-up 🎁 Donate supplies
50 free learning sites + 6 school-subscription sitesGrades K–12Works on Chromebooks and phones
🛡️ Respect zone: No offensive language, bullying, threats or violations of School District of Philadelphia policy anywhere on this site. Read the rules
  • 🎓
    Brooklyn CollegeBachelor's degree
  • 🎓
    Holy Family UniversityGraduate degree in Education
  • 🎓
    Gwynedd Mercy UniversitySecond graduate degree in Education
  • 📚
    Eastern UniversityM.Ed., Educational Leadership with Principal Certification (in progress)
  • 🔬
    George Washington High School9th Grade Science · Biology, Physical Science, Science & Society
Meet your teacher

👨🏾‍🏫 Mr. Casimir: every student, ready to learn

Mr. Casimir believes that every student who walks through his classroom door can do real science, and that his job is to clear the path so they can.

His journey in education began at Brooklyn College, where he earned his bachelor's degree in the early 2000s. What started as a love of learning became a calling to teach. He went on to earn a graduate degree in education from Holy Family University, then a second graduate degree in education from Gwynedd Mercy University, preparing him to reach students in the upper grades of high school. Today he continues to grow as a leader, pursuing a master's in Educational Leadership with Principal Certification at Eastern University.

At George Washington High School, Mr. Casimir teaches 9th-grade Biology, Physical Science and Science & Society. His classroom brings together students with many different strengths, including students who receive special education and learning support, students on the autism spectrum, and students who learn best by seeing and doing. He doesn't ask students to fit one way of learning. He builds lessons that meet them where they are.

🌱 What he believes

  • 🧠 Every learner can succeed. With the right support, every student can master challenging science, so he plans for different learners from the start.
  • 👀 Learning should be seen, heard and done. Visuals, short readings, videos, puzzles and hands-on practice give every student more than one way in.
  • 🧭 Structure builds confidence. Clear routines, step-by-step directions and a calm, predictable classroom let students take risks and try again.
  • 🤝 Respect is the foundation. A classroom where everyone is safe and valued is a classroom where everyone can think.
  • 👨‍👩‍👧 Families are partners. Students do best when teachers and families work as one team, so he keeps communication open all year.

For Mr. Casimir, success isn't only a grade on a report card. It's the moment a student who once said "I'm not a science person" explains how a cell works, or why atoms bond, and realizes they belong in the conversation. That moment is why he teaches, and it's what he works toward with every student, every day.

— Mr. Hans Casimir, George Washington High School

Mr. Casimir's classes · George Washington HS

🏫 My Google Classroom

Sign in with your school Google account (@philasd.org), then join your class with its code. Your assignments are under the Classwork tab.

How to join: open Google Classroom, click + at the top right, choose Join class, and type your class code. Only join the section on your schedule.

Done, stuck, or curious?

✉️ Message Mr. Casimir

Tell me when you finish a task, ask a question, or leave a comment. Your message opens in Gmail, addressed to my school email. Check it, then press Send.

Use your school Google account. Please don't include passwords or private health information. Every message must follow the site rules: no offensive language or threats.

What is this about?
Study together

🙋 Ask your classmates

Stuck on a question? Ask your class in the 📌 Study Help Q&A post at the top of your Google Classroom stream. Only students in your class can see it, and Mr. Casimir reads every comment.

✅ Do

  • 📚 Ask about assignments, vocabulary, labs and homework
  • 🧠 Explain how you solved it, so others learn too
  • 🔗 Share links to sites on this page
  • 🤝 Be kind and patient

🚫 Never share

  • 📵 Phone numbers, addresses or social media
  • 🔒 Passwords or login codes
  • 🙅 Personal stories, photos or private information
  • 📝 Full answers to tests or quizzes

Posts that break these rules are removed. Offensive language, threats and other school-policy violations are reported, as explained in the site rules. Questions about grades or anything personal go to Mr. Casimir privately using the message form.

For parents & families

👨‍👩‍👧 Parent sign-up

📊 Report card conferences · Monday, November 16, 2026

Book your 15-minute conference

Pick an open time from 12:00–2:30 PM or 5:30–7:30 PM, in person at GWHS or on Google Meet. You'll get a confirmation and a reminder email.

📅 Choose a time on SignUpGenius ↗

For a meeting about a concern, Back-to-School Night, or if none of the conference times work, use the form. Your request opens as an email to Mr. Casimir, and he'll reply to confirm a time.

  • 📊
    Report card conferenceReview grades, progress and next steps, about 15 minutes
  • 🎒
    Back-to-School NightMeet Mr. Casimir and learn about the class and expectations
  • 💬
    Meeting about a concernAcademic, behavior, IEP or other questions, in person, by phone or on Google Meet

Your details go only into the email you send. Nothing is saved on this website.

I'd like to sign up for
George Washington HS · 2026–27

📅 School calendar & key dates

Upcoming days off, report card conferences, testing and family events. Click ➕ Add to save any date to your Google Calendar.

🏛️ District calendar ↗ 🦅 GWHS website ↗

Dates come from the GWHS 2026–27 school calendar and can change. Check announcements in Google Classroom for updates.

Know where to be

🔔 Bell schedule

Classes rotate on A days and B days. Find your lunch group (Mod 1, 2 or 3) and follow that column.

Town Hall days use the Advisory schedule. Your teacher will tell you when a half day or 2-hour late arrival is in effect.

Code of conduct

🛡️ Rules for this site

This site follows the School District of Philadelphia Student Code of Conduct and Acceptable Use Policy. These rules apply to messages, the classmate Q&A, and everything you do from this page.

🚫 Not tolerated, ever

  • 🤬 Offensive, rude or hateful language
  • ⚠️ Threats of any kind, including as a "joke"
  • 😠 Bullying, harassment or making fun of anyone
  • 🔞 Inappropriate pictures, links or content
  • 🕵️ Pretending to be someone else, or sharing anyone's personal information
  • 📋 Cheating, or sharing test and quiz answers

⚖️ What happens

  • 🗑️ The post or message is removed
  • 📞 Mr. Casimir follows up, and families may be contacted
  • 🏫 Violations are reported under school policy
  • 🚨 Threats and safety concerns are reported to school administration right away

🆘 If you see something that worries you, or someone is in danger, tell Mr. Casimir or another trusted adult at school right away. In an emergency, call 911.

Course textbooks

📘 Read your textbook online

Sign in with the school account your teacher gave you. Science & Society uses a free open textbook with no login.

Physical Science · Savvas Realize
⚛️

Physical Science: Concepts in Action

Your eText with chemistry, physics, and earth & space science units, plus assignments your teacher sends through Realize.

School loginSavvas
Open Savvas Realize ↗
Biology · Kendall Hunt Flourish
🧬

BSCS Biology: Understanding for Life

Your student eBook, unit student sheets and slides for Biology, through the Kendall Hunt Flourish site.

School loginKendall Hunt
Open Flourish ↗
Science & Society · Clemson Open Textbook
🌍

Science, Technology & Society: A Student-Led Exploration

A free, open online textbook. Read it chapter by chapter on any device.

FreeNo login
Open the textbook ↗
Watch & learn

▶️ YouTube videos by class

Trusted science channels and topic searches matched to what we study. Each link opens YouTube.

Game library

🎮 Pick a game, start playing

Filter by how you want to learn. Most games need only a PIN or class code from your teacher.

Free to use

No cost for students. Some ask for a class code or school Google sign-in.

Needs a school or paid subscription

Full access requires a subscription. Use these through your school account, or ask your teacher whether our class has access.

For students

🔢 How to join a live game

  1. Get the PIN

    Your teacher puts a game PIN or class code on the board.

  2. Open the site

    Go to the game's join page: kahoot.it, quizizz.com/join or play.blooket.com.

  3. Type the code

    Enter the PIN and a nickname. Use your first name or the name your teacher asks for.

  4. Play and review

    Answer fast, then check the questions you missed when the game ends.

Students: never share passwords or personal details in a game nickname. Teachers: create your games from the teacher sites linked in the library above.

For parents and families

✏️ Stock the classroom: pencils, pens and the basics

Many students arrive without the supplies they need to take notes, do labs and finish homework. Your gift buys those everyday items for a 9th-grade science classroom in Philadelphia so every student starts class ready to learn.

Every dollar goes to classroom supplies. Donors get an update showing what was bought.

🎁 What your gift buys

  • $10✏️ Pencils and erasers for a whole class
  • $15🖊️ Pens and highlighters for note-taking
  • $25📓 Composition notebooks for a lab group
  • $50📏 Glue sticks, rulers, markers and folders
  • $100🧪 A semester of science lab supplies
Donations are processed securely by GoFundMe.