You're on track to get doubled donations (and unlock a reward for the colleague who referred you). Keep up the great work!
Take credit for your charitable giving! Check out your tax receipts
Donate
To use your $50 gift card credits, find a project to fund and we'll automatically apply your credits at checkout. Find a classroom project
Menu
Skip to main content

Help teachers & students in your hometown this season!
Use code HOME at checkout and your donation will be matched up to $100.

Your school email address was successfully verified.

Edit classroom photo

Mr. Watson’s Classroom Edit display name

Support his classroom with a gift that fosters learning.

  • Monthly
  • One-time

We'll charge your card today and send Mr. Watson a DonorsChoose gift card he can use on his classroom projects. Starting next month, we'll charge your card and send him a DonorsChoose gift card on the 17th of every month.

Edit or cancel anytime.

cancel

Support Mr. Watson's classroom with a gift that fosters learning.

  • Monthly
  • One-time

We'll charge your card today and send Mr. Watson a DonorsChoose gift card he can use on his classroom projects. Starting next month, we'll charge your card and send him a DonorsChoose gift card on the 17th of every month.

Edit or cancel anytime.

Make a donation Mr. Watson can use on his next classroom project.

https://www.donorschoose.org/classroom/3715392 Customize URL

View your stats
Track donations »
Edit
It is commonly accepted that the mass of an electron is 9.1× 10^-31 kilograms, and a quick Google search will tell you that. "But how do we know?" This is the question asked by the advanced students of the electricity and magnetism class. By varying voltage and current in the field coils, the students calculate the mass of a single electron. They will be able see the light blue glow of the electron beam and watch it arc inside the magnetic field, giving them an amazing visual of the complex mathematics they are learning about. The Lorentz force demonstrator will be used for an inquiry project while the students are learning about magnetic fields. Students will need to combine their knowledge of electric fields with magnetic fields in order to control the device and create a visible electron beam that bends in a circular path. Then with just some simple measurements such as input voltage and diameter of the electron beam, they will be able to calculate the mass of a single electron. This is a great project for these advanced students because it challenges them to combine all of their knowledge gained through two years of physics; building their own equations to solve a complex problem with a hands-on real demonstration.

About my class

It is commonly accepted that the mass of an electron is 9.1× 10^-31 kilograms, and a quick Google search will tell you that. "But how do we know?" This is the question asked by the advanced students of the electricity and magnetism class. By varying voltage and current in the field coils, the students calculate the mass of a single electron. They will be able see the light blue glow of the electron beam and watch it arc inside the magnetic field, giving them an amazing visual of the complex mathematics they are learning about. The Lorentz force demonstrator will be used for an inquiry project while the students are learning about magnetic fields. Students will need to combine their knowledge of electric fields with magnetic fields in order to control the device and create a visible electron beam that bends in a circular path. Then with just some simple measurements such as input voltage and diameter of the electron beam, they will be able to calculate the mass of a single electron. This is a great project for these advanced students because it challenges them to combine all of their knowledge gained through two years of physics; building their own equations to solve a complex problem with a hands-on real demonstration.

Read more

About my class

Read more
{"followTeacherId":3715392,"teacherId":3715392,"teacherName":"Mr. Watson","teacherProfilePhotoURL":"https://storage.donorschoose.net/dc_prod/images/teacher/profile/272x272/tp3715392_272x272.jpg?width=136&height=136&fit=bounds&auto=webp&t=1507311813457","teacherHasProfilePhoto":true,"vanityURL":"","teacherChallengeId":20802628,"followAbout":"Mr. Watson's projects","teacherVerify":-1892208690,"teacherNameEncoded":"Mr. Watson","vanityType":"teacher","teacherPageInfo":{"teacherHasClassroomPhoto":true,"teacherHasClassroomDescription":true,"teacherClassroomDescription":"","teacherProfileURL":"https://www.donorschoose.org/classroom/3715392","tafURL":"https://secure.donorschoose.org/donors/share_teacher_profile.html?teacher=3715392","stats":{"numActiveProjects":0,"numFundedProjects":1,"numSupporters":4},"classroomPhotoPendingScreening":false,"showEssentialsListCard":false}}
Supporting teachers and students since 2000

DonorsChoose makes it easy for anyone to help a classroom in need. Public school teachers from every corner of America create classroom project requests, and you can give any amount to the project that inspires you.

We've earned the highest possible ratings from Better Business Bureau, Charity Watch, Charity Navigator, and Guidestar.