Strype: Python with a blocks-like interface, in the browser

Python is a popular programming language for teaching at secondary level, but pupils can struggle with the transition from block-based programming (e.g. Scratch) into Python.  To help with this transition we have created a new free tool, Strype, which uses an advanced blocks-like way to edit and run Python programs entirely within the browser.  In this talk we will demonstrate Strype and explain the ideas behind its design -- then we will invite your feedback on ways we could improve it to better suit use in schools.