One other hurdle that CTE teachers have to teaching academic subjects, beyond the misunderstanding of what their credential allows, and also the bad policy of not allowing them to gain supplementary authorizations, is that many administrators and CTE teachers may not realize that California Designated Subjects credential holders can be recognized as “Highly Qualified” by federal/state standards, which originally came from No Child Left Behind. (I should note my personal opinion that the Highly Qualified designation or lack thereof does not necessarily mean one truly is qualified or not, as it is clear that there are many Type I and Type II errors that can occur, but none the less, getting this designation is an important legality for schools to keep federal funding.)
UPDATE: Since writing this original post, I have discovered that in California CTE teachers who are teaching applied academics are automatically considered Highly Qualified, as I will be posting about soon. But for anyone who is interested in knowing more about how to potentially get the Highly Qualified designation, I have kept this article online.
Yesterday, I posted about the 
When I was a child, my mom decided not to use the traditional “I’m going to count to 3” with me for discipline, because she was concerned that it might lead me to having a negative view towards numbers. Instead she used “White, Yellow, Red”. And while it is quite circumstantial evidence with only a sample size of one, I grew up to love math, and not especially be into colors (despite being artistic). Now as an educator who has studied a little bit about how the brain works, I think there is something to what my mom was thinking, and in fact this could literally be contributing to our nations problems with innumeracy and falling behind in STEM (Science, Technology, Engineering and Math) from other nations.