The best free AI courses and certificates for upskilling in 2026 - and I've tried them all

I've worked with AI for decades and have a master's degree in education. Here are the top free AI courses online that I recommend - and why.
IEEE

A 4.2 Gb/S $5^{\text {th }}$ Generation F-Chip of Toggle 5.1 Specification With All-Path ...

Abstract: This paper introduces a $4.2 ~\text{Gb} / \mathrm{s} 5^{\text {th }}$ generation F-chip operating at a 1.1 V supply voltage. To achieve high-speed performance even in high-capacity memory ...