## Day 45 – 3D Printers Unpacked

Math – Today I unpacked the two 3D Printers that arrived. I ordered 2 refurbished “Simple” printers from Printrbot. I’m not entirely sure when I will get time to set them up though. I think the fume hood will be a great place for them, as the exhaust can easily handle any smells and the sash window can help block noise.

Unfortunately it looks like one of the printer’s extruders is at an angle. I don’t know if this causes problems or not, so I will try to get a hold of Printrbot and see what they have to say.

## Day 44 – Arduino

Engineering Physics – Students started using Arduinos today. There was some puzzlement and headscratching, but also some very pleased kids. One student had the biggest smile I think I’ve ever seen on the student. She was so proud and happy to create a circuit where LED’s flashed on and off. I think it was the idea that they accomplished something concrete yet totally foreign to them. That “Holy sh%t, I actually did it!” kind of feeling.

## Day 43 – F=mg

Physics 11 – In previous I my students always seem to have an on-going battle with “weight”, “force of gravity”, “Fg” and “mass.” I thought I’d confront this issue head on this year. My classes did a lab finding the relationship between Force of gravity and mass. They also used Excel to produce their graphs, which will make subsequent graphing tasks in class much faster. The students will then practice targeted questions on Fg. Hopefully this bit of time will pay off throughout the year.

## Day 42 – Arduino Enthusiasm

Engineering Physics – We finally had a bit of luck today and most of the computers logged in fairly quickly. Students got to make their first Arduino sketch and circuit. The main goal was to choose an appropriate sized resistor to match an LED, build the circuit with a breadboard, and make the LED blink. Some groups were quicker than others and they started to develop their own more complicated circuits involving multiple LEDs.

The students were pretty pumped and many asked me if we could work on the Arduinos again next day. The plan is for them to build a timing system using photoresistors, so yes, we’ll be using the arduinos.

In Physics 11, the students started off with a Plickers kinematics question. I chose a question that would likely lead the students to use d=vot + 1/2at^2.  The wrong answers included not squaring the time, and not considering that there was acceleration (using d=vt instead).  I then challenged students to create fully annotated graphs from a different problem.  We did a gallery walk with the whiteboards and I wrote down properties of the graphs that we agreed were good to include.

## Day 41 – Tech Frustrations

Math 8 and 11 – The above picture pretty much sums up my day. You probably can’t see it, but one of the notebooks has the network connected with internet access the other one does not. For most of my days this year I’ve had fantastic problems connecting to the network on the class notebooks. It will take anywhere from 2 to 60 minutes for a notebook to login and connect.

I’d be ok with the computer not connecting to the network, but the Arduino IDE that we use needs to store files locally, and in our school district the IT people decided to make each person’s My Documents a network drive. So if there’s no network, there’s no way to run the Arduino software.

But there’s more.

We spent over an hour of class trying to get kids signed up for Powerschool so I can use their SBG Gradebook. Students have several problems with registering on websites, including:

• they have multiple email addresses and can’t remember which one they’ve used