Monday, December 28, 2015

T'is the Season for Logs...Clothesline Style

I love logs and I love teaching logs.  They are all made more fun with crowdsourcing from Twitter with:
Julie using Zombies as opener to create a need for logs
Kate's discovery activity for Log Laws
Wendy recaps her love of logs
Andrew writes about Clotheslines here with an idea from Chris Shore

I figured I would bring the Clothesline idea into high school in my logs and exponential unit.  I had fun putting together logs and exponents onto a number line.  That would be a fun activity for the kids.  It really made me think.

Log and Exponent Clothesline    I think and hope I fixed my typos and mistakes.

My husband used an old soccer net and screen spline to make this clothesline.  Of course, I added some pink duct tape:  (My Algebra 1 class used it to Limbo)

I made my number line on paper first.  Then, I chose to have 16 cards per group of 4 kids.  I wasn't sure if I wanted to use 2 clotheslines and have a competition between teams, but I decided on 1 clothesline and just compete by time.  I made 6 sets of cards.  The first set is a practice set - no logs or exponents, but still challenging with fractions, decimals, and radicals.  This would allow the class to see how it is done.  It also gave us a quick time to aim for.

I used 4x6 index cards and wrote one problem on each.  I added symbols to each group so if they got mixed up, I would be able to sort them after.  I told them they couldn't write on the cards so I could use them again but they could use the board if needed.

I did this activity on the day before Christmas break.  I returned a quiz and we went over that, then we did this for the rest of the class.  It would work well on a review day when the rest of the class might be working on something else and you call up one group at a time.  I had one group up front and the rest were the audience, planning their strategies for attack. 

I teach Accelerated Algebra 2 during period 4 and 5, so I left the time results from period 4 on the board and we challenged period 5.  Rounds were the same in each class so we could compare.  At the end, I asked if anyone wanted to try it individually but no one wanted to.

I asked one group if I could record them.  They happened to be the only group to bump it and knock some of the cards off, but they laughed and had fun.

I used an online timer and let the kids start sorting.  I stopped the clock when they were done and checked their answers.  If they had something wrong, I took those cards off and re-started the timer and they fixed it.

One thing I keep stressing is that a negative exponent doesn't make it a negative number.  Some kids were still doing that.  The fractions with small denominators were hard to put in order :)

Overall, the kids that were sorting were having great conversations and working well together.  I think we all enjoyed it.  

Wednesday, December 23, 2015

My Teacher-Created Desmos Activity - Graphing Rationals

I love seeing teachers post their own teacher-created Desmos activities on Twitter so I decided to give it a try.  I had a lesson on a worksheet that lent itself well.  Originally, it had kids writing rationals equations on paper but using Desmos, so I made it no paper - all Desmos.  I decided 16 slides would be good and it worked great time-wise.

The students graphed reciprocal graphs and rational graphs as part of their homework by using the parent graph and transformations on paper the night before.  It is a hard concept.  So, I thought this would help them.

We started class with a Desmos-made activity called Polygraph.  I have used it with quadratics and it is great.  We did it with rationals.  I gave them about 15 minutes to play each other and the class was quiet.  It was great to watch their vocabulary on my teacher dashboard.  They didn't want to end, but I directed them to my activity with the pin number.

Almost forgot, here is the link: Graphing Rational Functions

I also had them work on mine as 2-1 (2 kids to 1 computer).  This was a good idea because they helped each other and the discussion was much richer.  It jumped right in with the first slide asking them to write a reciprocal function with 3 asymptotes.  In between I asked them where in the fraction the vertical asymptotes come from, what determines the horizontal asymptotes, the holes, the slant asymptote.  My 2 favorite parts were AHA moments about holes and slant asymptotes.  They had a fraction that when graphed would have a hole.  When they looked at the graph it looks like a solid line but when they hover at x = 2, they see the point says undefined, yeah!  They said "I found the hole!"  So much more powerful than on the TI calculator.

And, then I gave them a function that had a slant asymptote and its graph (slant asymptote was not graphed).  I asked them what it was.  They did division and got the equation of the line and graphed it and voila! it checked out. 

Time-wise it went great.  The difficulty level was good for my accelerated algebra 2 class.  Here is a look at some of their work from my dashboard.


Another picture:  (Some misunderstandings and things that need to be addressed)

Slant asymptote question:

I was really happy that it all went so well.  The kids got a lot out of it.  It led to more discussion the next day.  The kids were discovering and engaged.  Thanks again Desmos.

Monday, December 21, 2015

Sorting Pennies before vacation

We are still working this week of Christmas.  Each year we sort pennies.  Then, we talk about the data collected.  Here is a picture of the kids sorting and then a picture of our dot plot.  I haven't remembered to collect anymore pennies, so I have none from 2014 or 2015.  I ask kids to predict the year that will have the most pennies represented.  Looking at the data, I ask the kids what they notice.  They usually notice the high and the low.  This class noticed it kind of dipped in the middle.  Then we talk about the HOW.  How would we find the mean, the median, the mode.  They always want to know how many pennies we sorted.  I hand out a random sized handful to each student in class.  In my first period class (not the one here), I managed to hand out exactly 300 pennies.  This class had less kids, but we still sorted 210 pennies.  Our oldest was from 1934!  The kids were working and it provided some good discussion. 


Wednesday, December 9, 2015

Twitter and My Conference Experiences

Twitter and My conference experiences:
I have had to opportunity to attend 3 conferences recently:
ATOMIM – in Maine
PCMITLP – Park City Math Institute Teacher Leadership Program in MA (town right next to me)
Twitter has shaped how I experienced these conferences.
For ATOMIM – I found out about it on Twitter.  I knew Dan Meyer @ddmeyer and Tina Cardone @crstn85 were both speaking.  Dan was the keynote speaker and speaking to a large group.  I went in and grabbed a table up front.  There was one woman there and  I introduced myself as Jennifer and that was her name, too (@michaelismath) (lots of Jennifers in this story).  We were checking each other out, had she heard Dan before, did she know about this or that.  Was she on Twitter?  Yes, she was.  Did we follow each other?  Yes, we did, how cool.  She knew Denis @mathdenisnj from NJ and twitter and he was joining us for another session.  I already followed Dennis on Twitter too, so no need for Jen to introduce me.  (Edited: I had Denis as Bob Lochel from Philly, sorry Denis) Did the rest of the conference and met up with Tina afterwards.  She was meeting Tracy (@tracyzager) from Maine and twitter after to chat, would I like to come?  Of course, I follow her on Twitter and it would be nice to meet her in person too.  She brought along her friend, Shawn (@towlemath) from Maine.  I did not follow Shawn but I added him to my list.  We had some great conversations.  Turns out Shawn would be traveling to CT for the conference I would be speaking at in CT.  Great conference, great day, great connections because I felt so comfortable.
Along comes PCMITLP.  Again this happened through Tina.  I applied and got accepted to attend this two day weekend conference.  I had heard about PCMI and its three week summer conference for teachers to do some challenging math all three weeks.  This seemed like the perfect taste so I was excited.  I invited my colleague, Kathy (@kd5campbell), who is on Twitter now too.  Only 35 people were allowed to attend to keep it more intimate.  We would be working together the whole weekend.  When I walked into the room, it was so nice to know so many people already – Tina, surprise – Shawn and Tracy from Maine, Heather (@heatherkohn) from Marlboro, MA, Wendy (@wmukluk) came in from NY (all from Twitter).  And, Beth (@bethdore) was there.  She was my student teacher a few years back, so it was nice to connect again.  We got to work doing some problems that are best explained here in Tracy’s post.  Our groups kept changing and we got to network.  Most people were on twitter so I started following them.  I met Cortni (@cortnij) from CT and turns out she would be at the next conference I was going to in two days in CT– ATOMIC and so was...Shawn from Maine.  Great, the fun would continue.  Overall, it was a great atmosphere and experience and I loved it. 

Next up is ATOMIC in CT.  My friend, Jennifer (@jensilvermath) from CT and twitter asked me over the summer if I would like to speak about MTBoS and Twitter as a PLN.  Sure, I would be honored.  I spent most of the fall collecting ideas to share, editing my keynote, adding more as more awesome tweets were posted and more great ideas were shared.  It was the ever changing keynote.  I found out that Rafranz Davis (@rafranzdavis) would be the keynote speaker.  I had heard of her in some circles, so time to start following her and see what she is all about.  At ATOMIC, I was going to present and also set up a MTBoS booth.  We had our first one at NCTM in Boston and it was so fun to connect and meet everyone I follow from Twitter.  It was like instant family.  The booth was the place to be.  People would rather hang out at the booth than actually go to the sessions.  It was powerful.  Jen and I set up our booth with lots of donations from our Twitter friends (thanks Max @maxmathforum from Mathforum/NCTM, thanks Desmos @desmos, thanks Andrew Stadel @mr_stadel from Estimation 180, thanks to Christopher Danielson @trianglemancd for the awesome tiling turtles and a signed book), thanks to Jen for her proradians, thanks to Ilana @tchmathculture for her donation of her book).  Really, these are amazing math people doing amazing things and the booth is a way to share that greatness.  I attended Rafranz’s keynote speech and did not know what I was in for.  She spoke to a room of 500 attendees.  She spoke about her teaching experience and how it has changed over time but the biggest change came with MTBoS!  Wow, she mentioned it – to all these people, how cool.  And, then she polled the audience (wow, that is what I was planning to do in my talk).  She asked how many people were on Twitter – about 30 hands out to 500 went up.  I have to admit, I felt a little deflated, but optimistic.  Then, she asked how many people blogged.  Interestingly, I raised my hand and so did the woman next to me.  We were the only 2 in the whole room.  This was crazy to me.  How were all of these teachers not connected to each other.  Why are they not getting all of the great stuff that twitter has to share?
The ATOMIC conference is organized a little differently than other conferences which has its good and bad parts.  Prior to the conference you must sign up for sessions – there were four sessions.  It is good because people are forced to have a plan and know where they are going.  It is also nice for the presenter because they know how much stuff to bring and plan for.  At most other conferences, if it is not interesting you, you can get up and leave.  You can chat with your friends there and decide last minute what you want to go to.  However, you might get shut out of one you really want to go to because it is full.  So, here I had Rafranz setting me up for a great chance to get people connected to Twitter and the MTBos but I knew I only had 15 people signed up for my talk.  That is okay, you have to start small.  I commended the people who came as they were following her challenge and taking that first step.  I did poll the audience.  A few people had at least heard of Dan.  Most people did not know what a 3-Act was.  I think 2 people had a Twitter name.  And, 6/12 knew about Desmos.  I used plickers to collect this data so I could show them those.  I planned on starting with the poll so I could know the direction my talk should go – how much depth to go into (or how simple to keep it).  I had a lot of slides (shhhh, 61) in my keynote, but there is just so much goodness to share.  If the conference were still two months away, I might have gotten to 100 slides.  I put all this goodness at the beginning of the talk and then the how do I get started on Twitter at the end.  Jen S from CT and twitter who had invited me to speak and was helping me with my talk suggested putting 3 or 4 fun activities up front, then do the how to tweet piece, then more sharing ideas.  Priceless feedback and it worked great.  I didn’t want to just stand up there and say “this is why you should be on twitter”.  I wanted to share and show them Barbie Bungee ( I had Barbie waiting on the tables for them), show them cup stacking, show them solve me puzzles, and we did a 3 act.  I wanted them to want more and I think it worked.  And, I did get through all of the slides.  I may have overwhelmed them a bit but when I go to a conference, I like to have something I can bring back to the classroom and use and that’s what I gave them.  I asked them to take a risk and try something new – not 20 things – just one thing.  Here is my keynote.
 Jen S was an organizer of the event which helped to conveniently have our booth as the first one when you walked in so we could grab (I mean greet) people on their way in and introduce ourselves.  It was also right across the room from my presentation so I could steer them there as they left.  And, as a side note, she gave me Talk 8 (thanks Jen).  People who went to the presentation did stop by, took some goodies, asked so more questions.  Shawn from Maine was at our booth in an NCTM capacity.  Cortni kept stopping in to say hi.  Rafranz hung out at the booth with us for a while.  I have seen a few newbie followers on my twitter feed, so I am following them right back.  It was Max Ray who really gave me the push from NCTM in CT in 2012 and maybe I did that for a few new people yesterday.
Now for a few pictures of the CT conference:
My table set up with Barbie:
Twitter Handles before and after
Booth fun and goodies:

Even better, tiling turtle fun:

Kudos if you made it this far!