Z-kai Learning Lab, in Arlington, is an after-school STEM program for ages 5-16. Courses run two hours per week, online or offline and are designed to instill 21st-century skills and cross-curricular knowledge. For more information or a free trial, email info@zkai-usa.com or call 781-914-3737. Registration is open now for winter courses:

• STEM and Literacy (ages 5-9)
• Robotics Basic (ages 5-11)
• Robotics STEAM (ages 10-11)
• Robotics Advanced (ages 11-13)
• Javascript Coding (ages 9+)
• Python (ages 9+)
• Zoom Up Math (ages 6-11)

Online Math Center (OMC) is a newly launched math tutoring company offering online after-school algebra and geometry lessons for middle and high school students. OMC aims to be “creative, bold, free-thinking, and rigorous.” Classes are interactive and augmented with games, with an average of 5 students meeting for 1-2 hours, three times a week. A free trial is available, as is individual tutoring. For more information, call 978-395-2026.

Science Olympiad runs annual STEM Olympiad tournaments for middle and high school students and has recently launched a new, nine-month program, MySO, for all students in Grades 6-12 who love STEM and want to stay engaged in learning. MySO offers free STEM session videos and lesson plans with new topics each month, such as epidemiology and space. Students may also purchase $10 admissions to monthly STEM Showdowns to compete in these topics with other students nationwide in Division B (Grades 6-9) or Division C (Grades 10-12).

Jr. Tech, a non-profit educational organization, will offer these STEM workshops in the coming months for Grades 5-8. Some workshops are online, and some are in-person at the Osterville Village Library on Cape Cod on weekends and school breaks. The in-person workshops can be converted to online if necessary.

• Architectural Design Studio — Design Your Own Dream House:  Online on half-day Saturdays, November 7, 14, 21. Grades 6-7.
• Sustainable Package Design: In-person on December 5, 9AM-3PM. Grades 5-7.
• Make Art and Storytelling Come Alive with Scratch: In-person on January 23 & 30, 9AM-3PM. Grades 6-8.
• Game Development in Scratch: In-person on February 6, 9AM-3PM. Grades 5-6.
• Escape Room Design: In-person, February 16-19, 9AM-3PM. Grades 6-7.

Code Ninjas in Wellesley is offering the following virtual programs this fall:

• Virtual JR Program: Coding with ScratchJR, starting October 12. Three parts, each with 8 one-hour sessions and a maximum of 5 participants. $125 for Part 1 and $160 each for Parts 2 and 3.
• Virtual Clubs:
  Roblox Adventures Game Builders Club: For ages 8+; no experience with Roblox required. Wednesdays, 3:30-5PM starting October 14.
  Roblox Vision, for ages 10+; no experience with Roblox required. Saturdays, 10:30AM-Noon starting October 17.
  Pygame Club: Building games in Python, for ages 9+. Saturdays, 1:30-2:45PM starting October 17.
  Improv & Filmography: For ages 8+. Thursdays, 3:30-5PM starting October 15.

iCode (73 Central Street in Wellesley) is offering more classes this fall including Minecraft, LUA programming with Roblox, and Python. They are offered both onsite and online with schedules that are flexible. Register ASAP, as classes start this week.