1. 2019. 2019 State of Computer Science Education. advocacy.code.org/ 2019. 2019 State of Computer Science Education. advocacy.code.org/
2. 2021. CS First. csfirst.withgoogle.com. 2021. CS First. csfirst.withgoogle.com.
3. 2021. Lightspeed. www.lightspeedhq.com. 2021. Lightspeed. www.lightspeedhq.com.
4. 2021. NetSupport. www.netsupportschool.com. 2021. NetSupport. www.netsupportschool.com.
5. 2021. Scratch in Many Languages – Scratch Wiki. en.scratch-wiki.info/wiki/Scratch_in_Many_Languages. 2021. Scratch in Many Languages – Scratch Wiki. en.scratch-wiki.info/wiki/Scratch_in_Many_Languages.