Desmos is a free online graphing calculator
fill in the shapes to destroy the invaders
additive counting vs. multiplicative counting
vsauce video eplaining different types of counting
how to spot misleading graphs
this video explains why labeling axes and units on graphs is important
why do people get anxious about math
this video talks about math anxiety and strategies to overcome it
video about functions, inputs and outputs
you're not bad at math...
explains how anyone can learn math, and how it can be helpful. Just ignore the full title of the video.