Rhiannon Dumpleton found Python in Pieces:

• Significantly improves attainment“I have been able to use this with both KS4 and KS5 students who have not previously had any experience with Python, but need to get up to speed quickly, this has helped them to do so. I have also been able to support very low ability students much better, as they are able to look at the guidance given on the website (videos for example) and therefore not need me to be with them quite so much, thus allowing me to help all students much easier.”
• Significantly builds student knowledge“Similar to my previous answer, PiP is just such a great resource to allow students to work more independently on building their knowledge of Python (which has been perfect during lockdown) while allowing me to keep track of their progress. When they are stuck, I can simply "log in" as them and see exactly where they are and what they've done wrong.”
• Slightly increases student collaboration“I have not been able to test this”
• Significantly reduces teacher workload“When lockdown was announced there was a panic in my department of how we are going to quickly create a scheme of work that is appropriate and accessible at home. PiP, being a website, meant that all the students needed was access to the internet and their login details, once that was set up, we didn't need to do any planning or marking, as PiP did that for us, we just had to check in on students (which was very easy to do, as I could click on a class and see the names of students who has attempted the work, how far they had got, and how many times they needed help).”
• Moderately provides school data“It is so easy to extract the data from the website, I can easily see how my students are getting on, who is struggling, and who is flying ahead.”