This special issue of JES is brought to you by the Primary Science Teaching Trust (PSTT), to celebrate the success of their second international Primary Science Education Conference (PSEC) held in June 2019. The issue includes articles based on a wide range of conference presentations and workshops, which demonstrated cutting-edge innovation and research-informed practice. This free, open access issue runs alongside the recently published PSEC special issue of Primary Science, which is also free to view for all.