In the Netherlands, we have a saying which was once a TV commercial for a toilet bowl cleaner. It goes like this: We from WC-duck recommend WC-duck. WC-eend (WC-duck) is a toilet bowl cleaner where the neck of the plastic bottle is shaped like a duck’s neck to easily spray the cleaner under the rim. Here is the Wikipedia entry – including a picture of the product – which you can go yo and translate into English by right-clicking anywhere in the entry and choosing translation.
A Hechinger Report review found dozens of education software companies promoting their products with little or shoddy evidence to support their claims.
Source: Ed tech companies promise results, but their claims are often based on shoddy research
You might also want to read the blog that Mirjam Neelen and I wrote about edupreneurs.