husband, dad, son, brother, math teacher, Mets fan, proud member of the #MTBoS, #iteachmath, music obsessive ( AKA DJ Calc)
Joined August 2013
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217 Photos and videos
Jan 21
An interesting take on the FTC from a student at our school. Asked for the derivative of the integral of sqrt (t) from 4 to x^2, she identified three cases for the answer. A) 2 < |x| B) 2 = |x| C) |x| < 2
Is she overthinking it, or have I been underthinking FTC?
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Jan 9
Trig question : for f(x) = A cos (bx) C sin (dx) I know that the period is the LCM of the two component periods. Is there a way to find the amplitude? Is amplitude a logical question?
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Jim Doherty retweeted
17 Dec 2025
Tonight's show on wrkc.kings.edu is uploaded
Here - mixcloud.com/DJCalc/dj-calc-…
and here - djcalc.com/2025/12/16/decemb…
Spotify Link - open.spotify.com/playlist/0h…
Playlist
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13 Dec 2025
A quick check seems to confirm this. Are these formulas ones any of you have seen before? He could not really explain his insight comfortably.
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13 Dec 2025
His formula seems to check. Someone else then asked about the number of rectangles is the original size was not 8 by 8 but, instead, an m by n rectangle. My student who proposed the original formula thinks this is a sum of sigma 1 to m of (m-x 1) and sigma 1 to n of (n-y 1)
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13 Dec 2025
In Calc BC yesterday I posted a picture of a chessboard and asked for how many squares there would be. We worked our way through to the answer. I then posed the question of how many x by y rectangles there would be. One student proposed (8-x 1)*(8-y 1)
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Jim Doherty retweeted
3 Dec 2025
Tonight's show uploaded here - djcalc.com/2025/12/02/decemb…
and here - mixcloud.com/DJCalc/dj-calc-…
Spotify Link - open.spotify.com/playlist/54…
Playlist
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Jim Doherty retweeted
19 Nov 2025
Tonight's show uploaded here - mixcloud.com/DJCalc/dj-calc-…
and here - djcalc.com/2025/11/18/novemb…
Spotify Link - open.spotify.com/playlist/05…
Tonight's Playlist
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Jim Doherty retweeted
12 Nov 2025
Tonight's show uploaded here - mixcloud.com/DJCalc/dj-calc-…
and here - djcalc.com/2025/11/11/novemb…
Spotify Link - open.spotify.com/playlist/0o…
Tonight's Playlist
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Jim Doherty retweeted
28 Oct 2025
For my show tonight on wrkc.kings.edu (7 - 9 PM ET) I shine a spotlight on The Bats (new album!) and feature @voxtrot @nadasurf @AmyRigby and new tunes by @cuddlemagic , Melody Chambers, Bruiser and Bicycle, and 16 others. You can stream from our site, so drop on by!
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Jim Doherty retweeted
22 Oct 2025
Tonight's show wrap
Uploaded here - mixcloud.com/DJCalc/dj-calc-…
and here - djcalc.com/2025/10/21/octobe…
Spotify - open.spotify.com/playlist/5N…
Playlist
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21 Oct 2025
It has been too long since I checked in on this account and it has been way too long since I blogged about my classes. Hoping to get more engaged again and here is my starting salvo
mrdardy.mtbos.org/2025/10/21…
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28 May 2025
Thinking about this last night watching Knicks and Pacers. Which is a worse situation: Losing game 2 when down 1-0 or losing game 4 when down 2-1? Is this generalizable?
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Jim Doherty retweeted
16 Apr 2025
Show uploaded here - mixcloud.com/DJCalc/dj-calc-…
Tonight's Playlist
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15 Apr 2025
Listening to @DrJYTAA is making me pretty happy right now. Listening here - listen.streamon.fm/wudr
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6 Apr 2025
So fun to hear @hpicciotto referenced in the puzzle segment on All Things Considered on @npr this morning. Always fun to run into math friends in the wild world
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Jim Doherty retweeted
19 Feb 2025
Tonight's show uploaded here - mixcloud.com/DJCalc/dj-calc-…
Tonight's Playlist
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12 Feb 2025
We looked at the graphs and saw it worked. A question came my way about the Chain Rule here. Since our Taylor was built with derivatives, my Ss expected some implication of the derivative of x^2 to be part of the new expansion. Any smart summary of why not? 2/2
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12 Feb 2025
Looking for help in explaining something. Working with Taylor series today. Derived series expansion for y = e^x
Showed my Ss that y = e^(x^2) was represented by simply replacing every x in original Taylor with an x^2
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12 Feb 2025
Tonight's show uploaded here - mixcloud.com/DJCalc/dj-calc-…
Spotify Link - open.spotify.com/playlist/1x…
Playlist
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