FLASHCARDS
This past week my sophomore class was working on angle relationships. I wanted something that went beyond the definitions because many of my kids could tell you that complementary angles add up to 90 degrees, but then have trouble turning that into an actual equation.
This was an attempt to make something that was more useable than a definition. The kids started by cutting out the first six card fronts and attaching them to index cards.
Next we went through them card by card labeling and coloring the angles, writing the relationship in words, and then writing an equation.
After going through all of them, I gave the kids the six card backs. They had to look at each one and decide which relationship it showed and tape it to the right card. They needed have me or someone with the correct answers check their cards before actually taping.

Here is a kid matching up his cards 
After putting the problems on, we went through the problems and discussed how to use what we knew to write and solve an equation. Going through this took very different amounts of time in different periods of mine.
Hi Sarah! Great post! I am a new teacher (trained in language arts, but teaching in all subjectseek!), and am trying to find resources to teach math to my (struggling) students. I love this lesson, and was trying to print out the flashcards, but it wants me to pay money (even though it says they're free...). Any suggestions? I think maybe I'm doing something wrong.
ReplyDeleteThank you!
Gina Hundt
Sarah
ReplyDeleteThank you for such a a complete resource on ISNs. I started having my HS geometry students create foldables second semester this year in hopes of salvaging my unsuccessful attempt at having students create a journal. The foldables have been INCREDIBLY successful; the journals are better but not what I now know I want...ISNs like yours! I've been researching and yout blog is by far the most helpful. So my plan is to conyonue to use foldables and create ISN next year. I did not see the back side of the amgle pairs flashcards, did I miss them or are they missing? Again thanks so much for sharing and helping a 20+ year veteran try new ideas!
Michele Ratcliff
This looks like such a wonderful idea! (I want to see specifics but the site says that it was deleted... would it be possible for you to post a document or file in which I can clearly see what was on the flashcards themselves??)
ReplyDeleteHi. I created a second page of angle pair types to as closely match what you did as possible. Here it is. https://www.dropbox.com/s/kh6ry4lk6x63ujb/Types%20of%20Angle%20Pairs.docx Hope you find it helpful, and that I haven't offended you. Thank you.
ReplyDeleteThis is a great idea. I will try this activity with my classes!
ReplyDeleteI really like this idea! I would prefer to represent supplementary angles not as a linear pair. I'm careful to distinguish the two as students sometimes think they're one and the same.
ReplyDeleteIs there a link to the flashcards,... I love the sounds of this activity and would like to use it in my geometry class next year. I just found your blog and have spent all day getting ideas! Thank you so much for sharing.
ReplyDeleteIs there a chance of see exactly what you wrote on the flashcards?
ReplyDeleteThanks for sharing.This is a great idea!
ReplyDeleteIs there a link to the flashcards? I would love to use it! Thanks for sharing!
ReplyDeleteDid you get the link to the flashcards?
DeleteI have to now integrate Geometry into my Algebra 1 classes. Eeekk, freaking out a little. I am teaching my first unit next week. I love these flashcards. Is there a link I can use to print them off? I didn't see it.
ReplyDeleteI would love to use this activity but I can't find the link to the cards. I tried the one in a comment posted above but it doesn't work. Could you please send it?
ReplyDeleteI would love to use this activity but I can't find the link to the cards. I tried the one in a comment posted above but it doesn't work. Could you please send it?
ReplyDeletehttp://TrianCal.esy.es  Open in Google Chrome. (Triangles online calculator developed by Jesus S.)
ReplyDeleteYouTube: https://youtu.be/V2IV7lY52mA
I propose this free online calculator triangles without advertising to help students with geometry, does not perform the duties, because their calculations formulas are not displayed. It is designed in a didactic way to check and view the realized duties.
TrianCal is online calculator triangles that works with any combination of values including sides, heights, angles, the area or perimeter of any triangle, calculating it with the minimum possible value (typically three).
Other functions:
 Draw the triangle (s) with GeoGebra.
 Set the range of values in each element.
 The type of angle.
 The type of triangle by its angles and sides.
 Selection of language (English or Spanish).
 Select the angle type [degrees (°), radians, degrees, minutes and seconds (° ' ") or degrees and minutes (° ')].
 Number of decimal places shown in the results (015).
 You can use the arrow keys and the Tab key to navigate through the settings.
 Dropdown menu to select the values comfortably.
 Create a link (URL) to the current triangle.
 An icon mail to communicate with the author.
NOTE: You must use the Google Chrome browser to display correctly TrianCal.
Examples of possible combinations:
 The area, perimeter and other data (side, height or angle), if the outside equilateral triangle would not need the third data.
 2 angles and other data (if the value of the other data is not put aside the value of "a" at the time of drawing the triangle is 10).
 One side, one high and one angle.
 3 heights.
 3 sides.
 2 heights and perimeter.
 Any other combination of values.
I would also love to use this, but I can not find the link to the flashcards as well. Could you send it. Thank you
ReplyDeleteCan I get the link for these flash cards? They look awesome!!!
ReplyDeleteschroederkellyn@gmail.com
Hello Sarah, I really like your approach to teaching angle relationships.
ReplyDeleteIs there any chance I can get access to the flashcards? It would be greatly appreciated.
Could I get the link also for the flash cards? These would be great for our interactive notebook! Thank you
ReplyDeleteldeyarmin@cencam.org
My 8th graders are struggling a bit with this concept and I love the flashcards idea! Anything hands on that they can manipulate seems to work wonders. Just curious if you were still giving out the link to the flashcards. It would be greatly appreciated.
ReplyDeleteThanks!
renee.christiansen@eastonvalleycsd.com
I, too, would enjoy using the flashcards for teaching 8th grade math. Any chance you could send them my way? gdannemiller@foundationacad.org Thanks!
ReplyDeleteI'm going to throw out there that I'd love to see the flash cards too. I am not exactly sure what's on each one and how they relate to the "problems" they go with.
ReplyDeleteDo you have a link to a TPT site or other online link?
I would also love to have the link to your flashcards for my 7th and 8th graders. If anyone else found the link, please share. Thank you!
ReplyDeletejennaereynolds8@gmail.com
I would also love the link to flashcards for my 7th and 8th graders. Thank you!
ReplyDeleteThank you for your idea! I would like to use them for my middle school students this week as we wrap up Special Angle pairs. Thank you, skmilerhome@msn.com
ReplyDeleteI too would love a link to be able to see the content for the fronts and backs of your angle flashcards. deborah.moran@bgreen.kyschools.us
ReplyDeleteI would love the flashcard info also. Can you post it again?
ReplyDeleteDo you have a link for the flashcards? These are great!
ReplyDeletefergusk@wyomingps.org
Do you have a link for the flashcards? These are great!
ReplyDeletefergusk@wyomingps.org
Apparently, this site is not longer being updated or monitored. :(
ReplyDeleteI searched the web for 45 minutes today could not find these flashcards even on TPT. :(
I hate it when links expire. :(
Hi! I would love to use this with my class, is there a link for the flash cards?
ReplyDeleteThanks!
Hi! Is there any way to access a link to the flashcards?
ReplyDeleteksmith@aldenschools.org
Thanks! Kristin
Hello! I would love a link to these flashcards if possible. mkleven@lpslions.org
ReplyDelete