… so, seems the “fifth anniversary upgrade” at FreeCodeCamp … has issues. I’m told that it’s “bad timing” that nets me the “can’t log in from that IP address” error message… but … the timing is always bad and while I got in after clearing old files at work, it didn’t work at home. So much for that badge for consecutive days 🙂 “Brilliant, dedicated” people are working on it (YES I hate classifying anybody as brilliant ;))…
I figured out how to make a pyramid for my “spaced retrieval” exercise (tho’ I need to add the last row!!! ) — *found* the typo errors *after chorus at home* 🙂 🙂
… except I really want to figure out doing things more visually… and I foudn the Chris Woodin stuff (not the book yet but I am not buying a third copy, thank you very much 😛 ) and his big ol’ visuals for the twos times tables… I’ll need to decide whether to “build” the twos that way or… all socks 😉 I’m thinking “get to deliverable” — that most people won’t need that much time on “doubling and symmetry.”
I figured out images — socs for 2 x 1, 4-leaf-clover for 2 x 2, insect (yea, that one’s the same as Woodin) for 3, and successfully moved to other things when I realized my masterpiece octopus icon wasn’t here (don’t remember what it was for but I think this was when I first braved clicking on the “paths” key… now I’m really not sure how I did it, tho’ as with the others I did half of it, copied the layer and flipped it for symmetry). It was on the home computer 😉 … but I’m going to go with more discrete countable representations.
Resource Room Dot Net Blog 
Brian Dennis
November 22, 2019
Have you tried R? It is free and runs on virtually any computer OS. It has taken the scientific world by storm. I have taught it to elementary school kids and secondary school kids. Tons of free documentation, tutorials, & videos are available online. Here is a book targeted at high school math & science courses:
https://www.crcpress.com/The-R-Student-Companion/Dennis/p/book/9781439875407