Bree Barnett Dreyfuss
@barnettdreyfuss.bsky.social
(she/her/hers) AP/Physics teacher in CA, Ambassador Program Coordinator @STEPUPphysics, @NCNAAPT Prez, Alum of @TeacherInstitut @Exploratorium, #iteachphysics
#Teach180 Day 61
AP learned about Kepler's Laws and derived the third one. They worry about it not being on the equation sheet until we derive it for a circle.
Physics did a max force lab, making use of string that I was gifted that falls apart very easily. Continuing to reinforce Fnet vs others.🎢🧪
AP learned about Kepler's Laws and derived the third one. They worry about it not being on the equation sheet until we derive it for a circle.
Physics did a max force lab, making use of string that I was gifted that falls apart very easily. Continuing to reinforce Fnet vs others.🎢🧪
November 5, 2025 at 12:54 AM
#Teach180 Day 61
AP learned about Kepler's Laws and derived the third one. They worry about it not being on the equation sheet until we derive it for a circle.
Physics did a max force lab, making use of string that I was gifted that falls apart very easily. Continuing to reinforce Fnet vs others.🎢🧪
AP learned about Kepler's Laws and derived the third one. They worry about it not being on the equation sheet until we derive it for a circle.
Physics did a max force lab, making use of string that I was gifted that falls apart very easily. Continuing to reinforce Fnet vs others.🎢🧪
I may have purchased 9 small foam pumpkins on sale ... I may make this theoretical problem into a lab practical. 🎢🧪
November 3, 2025 at 5:00 PM
I may have purchased 9 small foam pumpkins on sale ... I may make this theoretical problem into a lab practical. 🎢🧪
#Teach180 Day 53 cont.
Physics did a balanced forces lab based on @kellyoshea.bsky.social. They start off calling every force a force of gravity but end up with good results. All you need are the push pull scales, balances that can read in Newtons and some mystery masses. 🧪🎢
Physics did a balanced forces lab based on @kellyoshea.bsky.social. They start off calling every force a force of gravity but end up with good results. All you need are the push pull scales, balances that can read in Newtons and some mystery masses. 🧪🎢
October 22, 2025 at 10:51 PM
#Teach180 Day 53 cont.
Physics did a balanced forces lab based on @kellyoshea.bsky.social. They start off calling every force a force of gravity but end up with good results. All you need are the push pull scales, balances that can read in Newtons and some mystery masses. 🧪🎢
Physics did a balanced forces lab based on @kellyoshea.bsky.social. They start off calling every force a force of gravity but end up with good results. All you need are the push pull scales, balances that can read in Newtons and some mystery masses. 🧪🎢
#Teach180 Day 43 cont
Physics continued exploring Newton's Laws without calling them that with the blocks & bands activities. They have similar blocks, some with hooks and some without that they attach to rubber band chains. Lots of prescribed experiments but they also do their own. 🎢🧪
Physics continued exploring Newton's Laws without calling them that with the blocks & bands activities. They have similar blocks, some with hooks and some without that they attach to rubber band chains. Lots of prescribed experiments but they also do their own. 🎢🧪
October 8, 2025 at 1:56 AM
#Teach180 Day 43 cont
Physics continued exploring Newton's Laws without calling them that with the blocks & bands activities. They have similar blocks, some with hooks and some without that they attach to rubber band chains. Lots of prescribed experiments but they also do their own. 🎢🧪
Physics continued exploring Newton's Laws without calling them that with the blocks & bands activities. They have similar blocks, some with hooks and some without that they attach to rubber band chains. Lots of prescribed experiments but they also do their own. 🎢🧪
#Teach180 Day 42 cont
Physics did exploratory activities about Newton's Laws, we just didn't call it that. Each group got one regular and one lead filled tennis ball. Then they used a rubber mallet to tap a bowling ball around a track they made. Pure chaos in the best ways. 🎢🧪
Physics did exploratory activities about Newton's Laws, we just didn't call it that. Each group got one regular and one lead filled tennis ball. Then they used a rubber mallet to tap a bowling ball around a track they made. Pure chaos in the best ways. 🎢🧪
October 7, 2025 at 12:53 PM
#Teach180 Day 42 cont
Physics did exploratory activities about Newton's Laws, we just didn't call it that. Each group got one regular and one lead filled tennis ball. Then they used a rubber mallet to tap a bowling ball around a track they made. Pure chaos in the best ways. 🎢🧪
Physics did exploratory activities about Newton's Laws, we just didn't call it that. Each group got one regular and one lead filled tennis ball. Then they used a rubber mallet to tap a bowling ball around a track they made. Pure chaos in the best ways. 🎢🧪
Vital piece of physics equipment for AP Physics to learn about forms on an object in UCM on a banked turn. 🎢🧪
September 30, 2025 at 2:40 PM
Vital piece of physics equipment for AP Physics to learn about forms on an object in UCM on a banked turn. 🎢🧪
Excited to see my @ncnaapt.bsky.social friends in about a month! 🧪🎢
September 29, 2025 at 4:23 PM
Excited to see my @ncnaapt.bsky.social friends in about a month! 🧪🎢
When I set it up again this morning the scales weren't quite as nice as last week. Individually they read about 3.5 N, when hung by only one scale its <7N. But students definitely got the idea when seeing the two set-ups. Easy to make, but of course I'd prefer Dan Burns' full size version. 🧪🎢
September 22, 2025 at 3:05 PM
When I set it up again this morning the scales weren't quite as nice as last week. Individually they read about 3.5 N, when hung by only one scale its <7N. But students definitely got the idea when seeing the two set-ups. Easy to make, but of course I'd prefer Dan Burns' full size version. 🧪🎢
Forgot to share the Bear Bosun Chair I made last week. I had rushed something last year and always meant to redo it. When AP C students did the '86 FRQ about it, I made this. Simple wood frame as the bear "seat," rubber bands to hold it, eye hooks and wire at the top, binder clip at hands. 🧪🎢
September 22, 2025 at 3:05 PM
Forgot to share the Bear Bosun Chair I made last week. I had rushed something last year and always meant to redo it. When AP C students did the '86 FRQ about it, I made this. Simple wood frame as the bear "seat," rubber bands to hold it, eye hooks and wire at the top, binder clip at hands. 🧪🎢
#Teach180 Day 31 cont:
New lab for me in Physics, students measured their vertical jump height by leaving tape on our exterior wall. They compared to where they can reach while grounded. They had a lot of fun. More practice problems about largest jump heights for different actions and creatures. 🎢🧪
New lab for me in Physics, students measured their vertical jump height by leaving tape on our exterior wall. They compared to where they can reach while grounded. They had a lot of fun. More practice problems about largest jump heights for different actions and creatures. 🎢🧪
September 20, 2025 at 1:25 PM
#Teach180 Day 31 cont:
New lab for me in Physics, students measured their vertical jump height by leaving tape on our exterior wall. They compared to where they can reach while grounded. They had a lot of fun. More practice problems about largest jump heights for different actions and creatures. 🎢🧪
New lab for me in Physics, students measured their vertical jump height by leaving tape on our exterior wall. They compared to where they can reach while grounded. They had a lot of fun. More practice problems about largest jump heights for different actions and creatures. 🎢🧪
@rogerfreedman.bsky.social your epic online posts made it to our Physics Club flyers.
August 28, 2025 at 2:20 PM
@rogerfreedman.bsky.social your epic online posts made it to our Physics Club flyers.
#Teach180 Day 15:
AP Physics worked through a review slide deck in partners for forces covering everything from units to vector addition to FBD, conceptual scenarios, etc. Great discussions if they engage with it. It includes this inertial reference frame question i mocked up: 🧪🎢
AP Physics worked through a review slide deck in partners for forces covering everything from units to vector addition to FBD, conceptual scenarios, etc. Great discussions if they engage with it. It includes this inertial reference frame question i mocked up: 🧪🎢
August 28, 2025 at 5:17 AM
#Teach180 Day 15:
AP Physics worked through a review slide deck in partners for forces covering everything from units to vector addition to FBD, conceptual scenarios, etc. Great discussions if they engage with it. It includes this inertial reference frame question i mocked up: 🧪🎢
AP Physics worked through a review slide deck in partners for forces covering everything from units to vector addition to FBD, conceptual scenarios, etc. Great discussions if they engage with it. It includes this inertial reference frame question i mocked up: 🧪🎢
Even with fresh batteries this one wont work ... I think its time it goes to the toy car junk yard. 🧪🎢
August 16, 2025 at 1:12 PM
Even with fresh batteries this one wont work ... I think its time it goes to the toy car junk yard. 🧪🎢
Tried something new this year, since I wanted them to only have one car at a time but they were going to race them later, they needed to know which was which. One person from their group signed the back of the car. That will work until I come up with cute license plate stickers. 🎢🧪
August 16, 2025 at 12:32 AM
Tried something new this year, since I wanted them to only have one car at a time but they were going to race them later, they needed to know which was which. One person from their group signed the back of the car. That will work until I come up with cute license plate stickers. 🎢🧪
Day 2 cont:
I think we could do this with carbon paper and a marble that would produce small marks. Dropping the markers leaves a big splotch which just adds to error. But I do like the visual of combining all their data on one big target. 🧪🎢
I think we could do this with carbon paper and a marble that would produce small marks. Dropping the markers leaves a big splotch which just adds to error. But I do like the visual of combining all their data on one big target. 🧪🎢
August 9, 2025 at 5:15 AM
Day 2 cont:
I think we could do this with carbon paper and a marble that would produce small marks. Dropping the markers leaves a big splotch which just adds to error. But I do like the visual of combining all their data on one big target. 🧪🎢
I think we could do this with carbon paper and a marble that would produce small marks. Dropping the markers leaves a big splotch which just adds to error. But I do like the visual of combining all their data on one big target. 🧪🎢
Another workshop by David Rakestraw and Dan Burns @the-physics-well.net for the @aapthq.bsky.social summer meeting in D.C. on Sunday afternoon.
#aaptsm25 #ITeachPhysics 🎢🧪
#aaptsm25 #ITeachPhysics 🎢🧪
July 17, 2025 at 5:47 PM
Another workshop by David Rakestraw and Dan Burns @the-physics-well.net for the @aapthq.bsky.social summer meeting in D.C. on Sunday afternoon.
#aaptsm25 #ITeachPhysics 🎢🧪
#aaptsm25 #ITeachPhysics 🎢🧪
There are lots of interesting workshops at #AAPTSM25 that still have some seats! Join David Rakestraw of LLNL and Dan Burns in this @phyphox.org based workshop on Sunday morning. 🧪🎢 @aapthq.bsky.social
July 17, 2025 at 1:33 AM
There are lots of interesting workshops at #AAPTSM25 that still have some seats! Join David Rakestraw of LLNL and Dan Burns in this @phyphox.org based workshop on Sunday morning. 🧪🎢 @aapthq.bsky.social
#iteachphysics any ideas what this is? Some kind of prism? Its tall. 🎢🧪
May 15, 2025 at 9:15 PM
#iteachphysics any ideas what this is? Some kind of prism? Its tall. 🎢🧪
Two foil wrapped pieces of wood with pieces of foam in between to make a giant capacitor model. I think I want to drill a hole in the middle so I can mount it to a ring stand but then I'll want to tilt it to make a non parallel one...
#ITeachPhysics 🧪🎢
#ITeachPhysics 🧪🎢
March 5, 2025 at 4:30 PM
Two foil wrapped pieces of wood with pieces of foam in between to make a giant capacitor model. I think I want to drill a hole in the middle so I can mount it to a ring stand but then I'll want to tilt it to make a non parallel one...
#ITeachPhysics 🧪🎢
#ITeachPhysics 🧪🎢
I made my own grading stamps, they might be a little small though!
"Consistent with earlier incorrect work and/or answers"
"Awesome physics thinking shown here"
#ITeachPhysics 🎢🧪
"Consistent with earlier incorrect work and/or answers"
"Awesome physics thinking shown here"
#ITeachPhysics 🎢🧪
February 17, 2025 at 1:20 AM
I made my own grading stamps, they might be a little small though!
"Consistent with earlier incorrect work and/or answers"
"Awesome physics thinking shown here"
#ITeachPhysics 🎢🧪
"Consistent with earlier incorrect work and/or answers"
"Awesome physics thinking shown here"
#ITeachPhysics 🎢🧪
Knitting hats on my knitting machine led to some charge build up apparently. This was after the first time or two I couldn't even get the cut end to go into the tube at all. #ITeachPhysics 🎢🧪
February 16, 2025 at 8:16 PM
Knitting hats on my knitting machine led to some charge build up apparently. This was after the first time or two I couldn't even get the cut end to go into the tube at all. #ITeachPhysics 🎢🧪
Important AP Physics C knowledge getting dropped as we learn about torsional pendulums. #ITeachPhysics
February 6, 2025 at 4:21 PM
Important AP Physics C knowledge getting dropped as we learn about torsional pendulums. #ITeachPhysics
Making physical pendulums for AP Physics trying to make productive use of nervous energy.
#ITeachPhysics 🎢🧪
#ITeachPhysics 🎢🧪
February 4, 2025 at 11:22 PM
Making physical pendulums for AP Physics trying to make productive use of nervous energy.
#ITeachPhysics 🎢🧪
#ITeachPhysics 🎢🧪