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
Dollar store for the win!
November 19, 2025 at 3:58 AM
Dollar store for the win!
#Teach180 Day 70
AP learned about ballistic pendulums, working through a sample problem I got from @the-physics-well.net so I can show his Flir video of it afterwards. I also demo it by shooting a ping pong ball then use the launcher with the plastic and metal spheres. Then they do it. 🧪🎢
AP learned about ballistic pendulums, working through a sample problem I got from @the-physics-well.net so I can show his Flir video of it afterwards. I also demo it by shooting a ping pong ball then use the launcher with the plastic and metal spheres. Then they do it. 🧪🎢
November 19, 2025 at 3:57 AM
#Teach180 Day 70
AP learned about ballistic pendulums, working through a sample problem I got from @the-physics-well.net so I can show his Flir video of it afterwards. I also demo it by shooting a ping pong ball then use the launcher with the plastic and metal spheres. Then they do it. 🧪🎢
AP learned about ballistic pendulums, working through a sample problem I got from @the-physics-well.net so I can show his Flir video of it afterwards. I also demo it by shooting a ping pong ball then use the launcher with the plastic and metal spheres. Then they do it. 🧪🎢
#Teach180 Day 70
AP learned about ballistic pendulums, working through a sample problem I got from @the-physics-well.net so I can show his Flir video of it afterwards. I also demo it by shooting a ping pong ball then use the launcher with the plastic and metal spheres. Then they do it. 🧪🎢
AP learned about ballistic pendulums, working through a sample problem I got from @the-physics-well.net so I can show his Flir video of it afterwards. I also demo it by shooting a ping pong ball then use the launcher with the plastic and metal spheres. Then they do it. 🧪🎢
November 19, 2025 at 3:05 AM
#Teach180 Day 70
AP learned about ballistic pendulums, working through a sample problem I got from @the-physics-well.net so I can show his Flir video of it afterwards. I also demo it by shooting a ping pong ball then use the launcher with the plastic and metal spheres. Then they do it. 🧪🎢
AP learned about ballistic pendulums, working through a sample problem I got from @the-physics-well.net so I can show his Flir video of it afterwards. I also demo it by shooting a ping pong ball then use the launcher with the plastic and metal spheres. Then they do it. 🧪🎢
#Teach180 Day 69
Physics had an end of unit test on forces while AP continues conservation of Momentum. The sheer number of variables in multiple object collision problems can be daunting, especially those that didn't take pre-req physics and are hearing all these concepts for the first time. 🎢🧪
Physics had an end of unit test on forces while AP continues conservation of Momentum. The sheer number of variables in multiple object collision problems can be daunting, especially those that didn't take pre-req physics and are hearing all these concepts for the first time. 🎢🧪
November 18, 2025 at 1:54 AM
#Teach180 Day 69
Physics had an end of unit test on forces while AP continues conservation of Momentum. The sheer number of variables in multiple object collision problems can be daunting, especially those that didn't take pre-req physics and are hearing all these concepts for the first time. 🎢🧪
Physics had an end of unit test on forces while AP continues conservation of Momentum. The sheer number of variables in multiple object collision problems can be daunting, especially those that didn't take pre-req physics and are hearing all these concepts for the first time. 🎢🧪
#Teach180 Day 68
AP had a small quiz on the p & J graphs & polynomial equations, and started reviewing Conservation of Momentum. Physics wrote their own problems about forces as a review activity before their upcoming unit test. They were very creative and good at considering realistic numbers. 🧪🎢
AP had a small quiz on the p & J graphs & polynomial equations, and started reviewing Conservation of Momentum. Physics wrote their own problems about forces as a review activity before their upcoming unit test. They were very creative and good at considering realistic numbers. 🧪🎢
November 16, 2025 at 12:41 AM
#Teach180 Day 68
AP had a small quiz on the p & J graphs & polynomial equations, and started reviewing Conservation of Momentum. Physics wrote their own problems about forces as a review activity before their upcoming unit test. They were very creative and good at considering realistic numbers. 🧪🎢
AP had a small quiz on the p & J graphs & polynomial equations, and started reviewing Conservation of Momentum. Physics wrote their own problems about forces as a review activity before their upcoming unit test. They were very creative and good at considering realistic numbers. 🧪🎢
#Teach180 Day 67
AP Physics did some misc impulse demos involving the Happy/Sad bouncing/sticking balls, some TIPERs related to impulse and graphs then got to play with air tracks. Simple observations this time because when we set up photogates the numbers aren't "perfect" and they complain. 😅🎢🧪
AP Physics did some misc impulse demos involving the Happy/Sad bouncing/sticking balls, some TIPERs related to impulse and graphs then got to play with air tracks. Simple observations this time because when we set up photogates the numbers aren't "perfect" and they complain. 😅🎢🧪
November 14, 2025 at 3:26 PM
#Teach180 Day 67
AP Physics did some misc impulse demos involving the Happy/Sad bouncing/sticking balls, some TIPERs related to impulse and graphs then got to play with air tracks. Simple observations this time because when we set up photogates the numbers aren't "perfect" and they complain. 😅🎢🧪
AP Physics did some misc impulse demos involving the Happy/Sad bouncing/sticking balls, some TIPERs related to impulse and graphs then got to play with air tracks. Simple observations this time because when we set up photogates the numbers aren't "perfect" and they complain. 😅🎢🧪
#Teach180 Day 66
Physics did the tape roll friction lab I got from @danhosey.bsky.social which really makes them think. Also lots of opportunity to think about error. After we learn about inclined planes they'll predict the initial after they measure how far the roll goes up the incline.🧪🎢
Physics did the tape roll friction lab I got from @danhosey.bsky.social which really makes them think. Also lots of opportunity to think about error. After we learn about inclined planes they'll predict the initial after they measure how far the roll goes up the incline.🧪🎢
November 13, 2025 at 5:17 AM
#Teach180 Day 66
Physics did the tape roll friction lab I got from @danhosey.bsky.social which really makes them think. Also lots of opportunity to think about error. After we learn about inclined planes they'll predict the initial after they measure how far the roll goes up the incline.🧪🎢
Physics did the tape roll friction lab I got from @danhosey.bsky.social which really makes them think. Also lots of opportunity to think about error. After we learn about inclined planes they'll predict the initial after they measure how far the roll goes up the incline.🧪🎢
#Teach180 Day 65 was the day before a 4 day weekend, almost as tough as Halloween.
AP reviewed Momentum & Impulse basics & did a desmos (now Amplify) card sort, graph drawing & calc practice activity.
Physics reviewed their Fnet quiz and started reviewing some problems based on common mistakes.🎢🧪
AP reviewed Momentum & Impulse basics & did a desmos (now Amplify) card sort, graph drawing & calc practice activity.
Physics reviewed their Fnet quiz and started reviewing some problems based on common mistakes.🎢🧪
November 12, 2025 at 4:58 AM
#Teach180 Day 65 was the day before a 4 day weekend, almost as tough as Halloween.
AP reviewed Momentum & Impulse basics & did a desmos (now Amplify) card sort, graph drawing & calc practice activity.
Physics reviewed their Fnet quiz and started reviewing some problems based on common mistakes.🎢🧪
AP reviewed Momentum & Impulse basics & did a desmos (now Amplify) card sort, graph drawing & calc practice activity.
Physics reviewed their Fnet quiz and started reviewing some problems based on common mistakes.🎢🧪
#Teach180 Day 64
Physics started on their friction lab today, they determined what they wanted to investigate as possibly affecting the magnitude of the force of friction. One class had variety with students testing texture, mass and speed. The other all tested textures. They write the procedure. 🧪🎢
Physics started on their friction lab today, they determined what they wanted to investigate as possibly affecting the magnitude of the force of friction. One class had variety with students testing texture, mass and speed. The other all tested textures. They write the procedure. 🧪🎢
November 7, 2025 at 5:40 AM
#Teach180 Day 64
Physics started on their friction lab today, they determined what they wanted to investigate as possibly affecting the magnitude of the force of friction. One class had variety with students testing texture, mass and speed. The other all tested textures. They write the procedure. 🧪🎢
Physics started on their friction lab today, they determined what they wanted to investigate as possibly affecting the magnitude of the force of friction. One class had variety with students testing texture, mass and speed. The other all tested textures. They write the procedure. 🧪🎢
#Teach180 Day 63
AP had a test on Gravitation (Force & Ug). We also started reviewing center of mass. Such a change from "find the balance point for fun objects" to CoM of multi-object systems and variable density. Not sure how difficult to make problems about the latter with the CED changes.🎢🧪
AP had a test on Gravitation (Force & Ug). We also started reviewing center of mass. Such a change from "find the balance point for fun objects" to CoM of multi-object systems and variable density. Not sure how difficult to make problems about the latter with the CED changes.🎢🧪
November 6, 2025 at 12:21 AM
#Teach180 Day 63
AP had a test on Gravitation (Force & Ug). We also started reviewing center of mass. Such a change from "find the balance point for fun objects" to CoM of multi-object systems and variable density. Not sure how difficult to make problems about the latter with the CED changes.🎢🧪
AP had a test on Gravitation (Force & Ug). We also started reviewing center of mass. Such a change from "find the balance point for fun objects" to CoM of multi-object systems and variable density. Not sure how difficult to make problems about the latter with the CED changes.🎢🧪
#Teach180 Day 62
AP Physics practiced Kepler's 3rd Law by collecting class data using AstriaGraph satellite information. We also applied it to Halley's comet and solar system objects.
Physics learned a bit about friction but not what causes it exactly. They started drafting an inquiry lab. 🎢🧪
AP Physics practiced Kepler's 3rd Law by collecting class data using AstriaGraph satellite information. We also applied it to Halley's comet and solar system objects.
Physics learned a bit about friction but not what causes it exactly. They started drafting an inquiry lab. 🎢🧪
November 6, 2025 at 12:18 AM
#Teach180 Day 62
AP Physics practiced Kepler's 3rd Law by collecting class data using AstriaGraph satellite information. We also applied it to Halley's comet and solar system objects.
Physics learned a bit about friction but not what causes it exactly. They started drafting an inquiry lab. 🎢🧪
AP Physics practiced Kepler's 3rd Law by collecting class data using AstriaGraph satellite information. We also applied it to Halley's comet and solar system objects.
Physics learned a bit about friction but not what causes it exactly. They started drafting an inquiry lab. 🎢🧪
#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 60
Halloween.
Minimum day.
Band was gone for a field trip.
Direct instruction learning would be tough. AP worked on a practice problem about g at the bottom and top of Olympic Mons, if Mars was spinning or not.
Physics reviewed some practice and had a short quiz on vertical Fnet.🧪🎢
Halloween.
Minimum day.
Band was gone for a field trip.
Direct instruction learning would be tough. AP worked on a practice problem about g at the bottom and top of Olympic Mons, if Mars was spinning or not.
Physics reviewed some practice and had a short quiz on vertical Fnet.🧪🎢
November 1, 2025 at 6:12 PM
#Teach180 Day 60
Halloween.
Minimum day.
Band was gone for a field trip.
Direct instruction learning would be tough. AP worked on a practice problem about g at the bottom and top of Olympic Mons, if Mars was spinning or not.
Physics reviewed some practice and had a short quiz on vertical Fnet.🧪🎢
Halloween.
Minimum day.
Band was gone for a field trip.
Direct instruction learning would be tough. AP worked on a practice problem about g at the bottom and top of Olympic Mons, if Mars was spinning or not.
Physics reviewed some practice and had a short quiz on vertical Fnet.🧪🎢
#Teach180 Day 59
Physics completed a mini-elevator lab, investigating how the lifting force changed with different types of motion. Little stuffed animals went for a ride in old server racks. 🎢🧪
Physics completed a mini-elevator lab, investigating how the lifting force changed with different types of motion. Little stuffed animals went for a ride in old server racks. 🎢🧪
October 31, 2025 at 8:04 PM
#Teach180 Day 59
Physics completed a mini-elevator lab, investigating how the lifting force changed with different types of motion. Little stuffed animals went for a ride in old server racks. 🎢🧪
Physics completed a mini-elevator lab, investigating how the lifting force changed with different types of motion. Little stuffed animals went for a ride in old server racks. 🎢🧪
I feel like you could strap a phone to some of the big RC cars. I feel like this should happen!
October 30, 2025 at 8:54 PM
I feel like you could strap a phone to some of the big RC cars. I feel like this should happen!
When a TA "fixed" mine he oiled it and replaced a belt. This seems more serious...
There are simple pump systems now, would the experiments be something you could do with a smaller/cheaper one?
There are simple pump systems now, would the experiments be something you could do with a smaller/cheaper one?
October 30, 2025 at 1:45 PM
When a TA "fixed" mine he oiled it and replaced a belt. This seems more serious...
There are simple pump systems now, would the experiments be something you could do with a smaller/cheaper one?
There are simple pump systems now, would the experiments be something you could do with a smaller/cheaper one?
#Teach180 Day 58
AP learned about gravitational potential energy beyond the immediate vicinity of Earth. Students always struggle with the Ug=0 at infinity ♾️ part. It takes practice and I find they do better when we compare two positions to think about Kinetic Energy gained. 🧪🎢
AP learned about gravitational potential energy beyond the immediate vicinity of Earth. Students always struggle with the Ug=0 at infinity ♾️ part. It takes practice and I find they do better when we compare two positions to think about Kinetic Energy gained. 🧪🎢
October 30, 2025 at 12:36 AM
#Teach180 Day 58
AP learned about gravitational potential energy beyond the immediate vicinity of Earth. Students always struggle with the Ug=0 at infinity ♾️ part. It takes practice and I find they do better when we compare two positions to think about Kinetic Energy gained. 🧪🎢
AP learned about gravitational potential energy beyond the immediate vicinity of Earth. Students always struggle with the Ug=0 at infinity ♾️ part. It takes practice and I find they do better when we compare two positions to think about Kinetic Energy gained. 🧪🎢
#Teach180 Day 57
AP students learned about how the gravitational acceleration changes as we fall through a hole in a planet. Good conversations and places to expand in the future.
Physics learned about vertical net force problems like in elevators. The infamous student on a scale problem. 🧪🎢
AP students learned about how the gravitational acceleration changes as we fall through a hole in a planet. Good conversations and places to expand in the future.
Physics learned about vertical net force problems like in elevators. The infamous student on a scale problem. 🧪🎢
October 30, 2025 at 12:27 AM
#Teach180 Day 57
AP students learned about how the gravitational acceleration changes as we fall through a hole in a planet. Good conversations and places to expand in the future.
Physics learned about vertical net force problems like in elevators. The infamous student on a scale problem. 🧪🎢
AP students learned about how the gravitational acceleration changes as we fall through a hole in a planet. Good conversations and places to expand in the future.
Physics learned about vertical net force problems like in elevators. The infamous student on a scale problem. 🧪🎢
#Teach180 Day 56
AP continued diving into gravitational force and acceleration.
Physics reviewed some more 3rd law concepts and did a practice problems based on the itsy bitsy spider with a Halloween decoration. The spider drops down rhen pulls itself back up. Attach to a force sensor, voila! 🎢🧪
AP continued diving into gravitational force and acceleration.
Physics reviewed some more 3rd law concepts and did a practice problems based on the itsy bitsy spider with a Halloween decoration. The spider drops down rhen pulls itself back up. Attach to a force sensor, voila! 🎢🧪
October 28, 2025 at 5:30 AM
#Teach180 Day 56
AP continued diving into gravitational force and acceleration.
Physics reviewed some more 3rd law concepts and did a practice problems based on the itsy bitsy spider with a Halloween decoration. The spider drops down rhen pulls itself back up. Attach to a force sensor, voila! 🎢🧪
AP continued diving into gravitational force and acceleration.
Physics reviewed some more 3rd law concepts and did a practice problems based on the itsy bitsy spider with a Halloween decoration. The spider drops down rhen pulls itself back up. Attach to a force sensor, voila! 🎢🧪
#Teach180
AP physics started learning about the law of gravitation by doing some ranking activities before some brief notes.
Physics started learning about Newton's 3rd law with notes and demos.
Both conversations will have to continue on Monday. 🧪🎢
AP physics started learning about the law of gravitation by doing some ranking activities before some brief notes.
Physics started learning about Newton's 3rd law with notes and demos.
Both conversations will have to continue on Monday. 🧪🎢
October 26, 2025 at 1:17 AM
#Teach180
AP physics started learning about the law of gravitation by doing some ranking activities before some brief notes.
Physics started learning about Newton's 3rd law with notes and demos.
Both conversations will have to continue on Monday. 🧪🎢
AP physics started learning about the law of gravitation by doing some ranking activities before some brief notes.
Physics started learning about Newton's 3rd law with notes and demos.
Both conversations will have to continue on Monday. 🧪🎢
#Teach180 Day 54
Even periods of AP Physics discussed my pumpkin bungee problem (odds has a variant). There are always different approaches but the majority of groups are successful the fiest time through it. I'd love it to be real and not theoretical but it's still a good challenge either way! 🎢🧪
Even periods of AP Physics discussed my pumpkin bungee problem (odds has a variant). There are always different approaches but the majority of groups are successful the fiest time through it. I'd love it to be real and not theoretical but it's still a good challenge either way! 🎢🧪
October 25, 2025 at 2:34 AM
#Teach180 Day 54
Even periods of AP Physics discussed my pumpkin bungee problem (odds has a variant). There are always different approaches but the majority of groups are successful the fiest time through it. I'd love it to be real and not theoretical but it's still a good challenge either way! 🎢🧪
Even periods of AP Physics discussed my pumpkin bungee problem (odds has a variant). There are always different approaches but the majority of groups are successful the fiest time through it. I'd love it to be real and not theoretical but it's still a good challenge either way! 🎢🧪
#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. 🧪🎢